Chastity Harness

Vendor: VAST

While this piece of gear is call “Chastity Harness”, it is also a nifty piece of bondage gear for rubberists. So even if chastity is not one of your kinks, give this review a read. You might find an interesting piece of gear nevertheless.

Before I start this review, a disclaimer: I have been involved early on in the design process of this gear piece. For the last couple of months, I have been wearing and giving feedback the Chastity Harness. The basis for this review is the prototype which has been modified over the months. While it should be like the final product, please excuse minor deviations.

The VAST Chastity Harness with the Codpiece Flap

As always on projects like this, my design work has been completely pro bono. I have neither been paid for my work nor getting paid for writing this review or profit from any sales.

Construction

The name “harness” is a bit misleading since this “waist harness” has actually a jockstrap configuration. The main body of this harness is the 38mm wide waist strap which comes in four different sizes, covering a wide range of body types from 70cm up to 119cm waists (roughly W28 to W47 if you American). The belt is closed with a lockable roller buckle which has a latex guiding loop. The male side of the belt features no less than 12 holes of the buckle for a finely adjusted fit. On both the top and bottom of the belts runs a line of Ø3.5mm holes which are 20mm apart. Using book screws you attach the thigh straps and other accessories to the main belt. If you are on the lower end of the waist circumference the belt can flop around a bit. Simply use one of the book screws to attach the belt end to the body. Since the buckle is locked, you are not going to take it off anytime soon anyway, or?

The chastity harness comes with two 20mm wide thigh straps. In order to assemble the Chastity Harness to your body, put the waist strap around on. Then attach the thigh straps about four or five holes left and right from the center using the book screws. For attachement on the rear you have two options and two possible configurations. Either you can use the a 20mm roller buckle attached to a small strap of Superior Latex or use redirectors through which you thread the strap and attach it to itself with the screws. The redirectors were my suggestion because if you use the belts, you have to fold the excess strap which for me disturbed the clean and sleek look. Since you have both options, give them a try and look what you like best! For attaching the buckle/ redirectors, you can either place them where your hips meet your ass cheeks for the jockstrap look. But you can also run them parallel to your tailbone to lock a butt plug in place. For this configuration, I actually recommend the roller buckles because it makes closing the straps easier once the toy is in place. Once assembled to fit your body, you can take this harness off like any other jockstrap plus opening the buckle up front.

The Kink3D Cobra Cage with the Strap Ring Attached to the Harness

To attach the chastity cage (or of you want are not into chastity also a not too thick cockring of course) to the harness, it comes with two pairs of slightly curved straps. The only have smooth latex on one side and bare Aramid on the other side. Being only half as thick as the other strap, the easily bend around the base ring of your chastity cage. Once bend around, attach them to the thigh straps using the screws again. The longer straps are for attaching it directly to the base ring or a cockring, the short ones are for attaching the Kink3D Strap ring.

A first (and hopefully not last) addition to the system is the Codpiece Pouch. In addition the codpiece flat itself, it comes with four short latex pieces with an attachment hole on side and the male side of the snap button on the other side and the corresponding book screws to attach it to the thigh straps. The codpiece flat is made out of 0.6mm latex. This makes the material thin enough to display a bit of chastity cage imprint.

All belts and connectors of the Chastity Harness are made out of VAST’s Superior Latex which is two layers of latex with a reinforcing layer of Aramid between them. Aramid is a fiber used for making ballistic body armor fabrics or sails so it can withstand a lot of force. These properties it lends the latex which you can now grab and pull without damaging it. On the codpiece flap, only the corners where the snap buttons sit are Aramid reinforced. All metal parts, including the snap buttons, are made out of stainless steel so the metal does not damage the latex. The female side of the book screws has a smooth domed head, the male has a slit for a screw driver. Depending if you prefer a rougher or sleeker look, put the smooth head on the outside.

The Codpiece Flap Showing Little Chastity Bulge since not being Worn on a Body

At the moment, it is only available in plain black Superior Latex. But since all gear is handcrafted in Dortmund, I assume you can ask for special colors. My personal with would be adding a – in my case – red contrast stripe to match my rubber harness. The codpiece flap I have already seen a version with a red stripe in the middle so I assume we will see some more colors soon.

Playing with the Chastity Harness

First, let’s talk about the chastity aspect. This harness is basically the gear head/ rubber fetishists alternative to the Mr S neoprene strap I reviewed two weeks ago. Once the base ring is connected to the harness, it is pulled closer to the body, keeping the cage upright. If the harness sits tightly, pulling your dick out is even harder than it is already with a correctly sized dick and base ring so it adds a bit of security.

Since the connecting loops are made out of a single layer of thin and soft latex, you can use your existing base ring. You might feel them a bit but due to the limited time you will be wearing the harness (more on that later), it will most likely not cause an issue. For added comfort, buy either a ring one size larger (with the harness tightly attached, this will not be a security risk) so it has a bit of wiggle room or one of the Strap rings if you own a Kink3D chastity cage which makes wearing the Chastity Harness a bit more comfortable. If you are going to wear the Chastity Harness on a more regular basis, I would recommend getting a dedicated ring anyway. This saves you taking out the screw driver every time you want to put the harness on.

The Locking Roller Buckle with the Guiding Loop and a Prototype of the D-ring Enclosing Strap

The locking of the waist belt is a nice psychological feature as it makes it impossible to take the harness off. Through this, the top has taken control over your cloths. But the a bit bulky buckle makes it a bit harder to wear under existing gear like rubber chaps. Only wear it under latex gear which you can carefully close in the front (like chaps with snap buttons). Chaps which are just being pulled up can get damaged by the lock or buckle if you are not extremely careful.

Getting the harness fitted for the initially takes a bit of time. When you are impatience like me, I highly recommend doing it together with a friend who can tightening the screws while it is on your body. Once it has been fitted, you can put it on like any other jockstrap with the small exception that you have to open and close the roller buckle since unlike cloth jockstraps it does not stretch to get over the hips.

Hitting the sweet spot between presence and bulkiness the “Chastity” Harness is a hot piece of gear for every more hardcore fetishist. It is the perfect solution for chaste boys who want to go out to a gear night not being naked and still proudly displaying their locked dick – either without any cover or through the imprint of the codpiece flap. Since chastity is only a nice kink of mine, I wore it most of the time with a cockring or without any at all. It was impossible to fit my Mister B Dougnut cockring under the straps but a thinner just round one does work. If you prefer larger cockrings, simply ask VAST for a longer strap when ordering.

The design and in combination with the Superior Latex material makes this rubber jockstrap (there, I finally said it!) a perfect piece of gear for every rubberiest and latex enthusiast. You know how some tops when fucking you tend to grab on your jockstrap’s waist band to pull you closer/ into position, destroying your fav jockstrap in the long run? Guess what, they can pull all they want with this motherfucker. It will not tear!

The Thigh Strap with the Redirector

During the feedback process I have asked for stainless steel D-rings for attaching a harness with downward facing straps (@VAST: maybe make a version of your Superior Latex bulldog harness with downward facing straps, pretty pretty please *puppy eyes*). But why only put them upfront? Put them on the sides, throw in a pair of scissor snap ended loops as handle and start plowing your bottom HARD. The side D-rings are also make this harness perfect for rubber bondage. Tied the bottom to a sling, to a bondage bed, tie his wrists to the side and start (ab)using him as you please. Along with this Chastity Harness, VAST release a Superior Harness strap-on harness (which can probably also be used for pumping and milking machines). If you are creative enough and can suffer through a bit of pressure of the toy base, I am certain with a bit of creativity and additional accessories from VAST you can combine these two gear pieces into one.

Keeping the different functionalities in mind, I am actually using the harness more during bondage scenes than keeping a chastity subs even more locked than he is anyway. Personally, the jockstrap has become a regular in my rubber gear setups, adding a codpiece or a signature piece to an otherwise smooth suit look. Sometimes for parties, I am combining this jockstrap with industrial gloves and waders, fucking with the rubber purists by covering everything but the torso except the junk.

When I first got this piece of gear, I was a bit annoyed how difficult it was to adjust and fit. But once fitted, it has become of the most used rubber accessories/ gear pieces I have worn – if I have not just fitted it to another testeee. It is a piece of gear a bit difficult to share, adding weight to the old saying: The sub owns the gear being put onto him, the top owns the toys being used on him.

The Chastity Harness with a Codpiece covering the Cage

One thing you have to be aware when buying this harness are the material properties of latex! First, latex does not breath. Quickly, moisture will form under it. Second, despite being made out of soft and flowing latex, it is not as flexible as cottom. Both factors combined will lead to chafing when wearing the gear over extended periods of time. Generally speaking, the Chastity Harness is a hot piece of gear for a session, for a party, for overnight but not made to lock a sub into it forever. Not only but especially when he needs a bit of ointment to wear his chastity cage. Natural oils will destroy latex. So if you are using ointments like milking grease or Albolene to keep the skin beneath the base ring smooth and the ring from chafing, do not put the harness on! If you have an issue with chafing (of the rubber loops), use silicone lube or silicone oil instead. If you have used any ointment containing mineral oils, paraffin or natural oils, clean the moisturized skin area and the base ring thoroughly before gearing up. If you wear it during fisting, you must never use oil based lubricants like Crisco or lubes infused with essential oils like clove (which you should never use for safety reasons anyway but that is a different conversation)! After having it worn, wash it – best with rubber detergent – and put silicone oil or talcum powder on it. Store it best loosely dangling from a hanger (do not let it touch other garments since getting silicone or talcum stains out of fabrings is a bitch) which will prevent creases.

Conclusion: Heavy duty piece of latex bondage – from simple chastity to elaborate setups
Pro Cons Where to get Price
Made for heavy duty place Initial fitting is a bit difficult and is best done with a friend VAST 179€ Chastity Harness

69€ Codpiece Pouch

199€ Strap-On Harness

Lockable
Wide range of play possibilities
Difficult to care for (like all latex)
Covers wide range of body types

Kink3D Strap Ring

The Kink3D Strap Ring Base Ring

Vendor: Kink3D

Hey guys! It’s been a while! What I had planed to be a shortish early summer break was extended due to daytime work stress and other shit. But now that Locktober is approaching and some of you will be attending Folsom street fair in San Francisco next week where a lot of kink purchase will be made, I decided today would be a good time trying to come back.

Construction

The Strap Ring is a special feature version of the base ring you need to lock your Kink3D Cobra or Viper chastity cage onto your body. Left and right of the lock loops have been added through which belts can be threaded. The loops have a width of 27.5mm and a clearing of 8mm so one inch wide belts fit easily.  The ring is available in all the diameter sizes and ring styles – XD for smaller & tighter balls, curved for meaty low hangers – like the standard ring and comes either in black or white.

The Strap Ring Attached to a Viper

This version of the base ring was launched together with a 35mm wide neoprene waist straps made by Mr S in their traditional black edges/ color middle part design in their seven most popular colors to match their iconic neoprene accessories like harnesses. It comes in three sizes covering a range of 28’’ – 46’’ waists. The length can be adjusted with snap buttons either on both ends or at the back.

Playing with the Kink3D Strap Ring

Especially when you are wearing a larger cage or have massive or low hanging balls which require a larger gap between the cage and the base ring, the entire cage can shift forward. By doing so, it creates a compact and heavy package away from the body which can feel uncomfortable, can get momentum when moving or chafing which makes wearing the cage 24/7 more difficult. The new base ring together with the strap, pulls the locked junk towards the body. Sitting closer to the body, both its footprint and leverage/ momentum is minimized. This especially good when you wear looser underwear or do sports which include running or cycling. Despite the large mechanical forces between the legs when moving them quickly, the cage securely stays in place.

The Mr S Neoprene Strap around the Kink3D Viper

The level of security and fit under these circumstances surprised me since neoprene is so soft and stretchy. These properties also makes the strap is almost unnoticeable. If you adjust it carefully, it sits right below your belt on your hips. At the front, it has to sit lower in order for the belt not to press the lock into your groin. The comfortable softness and stretchiness comes at a small price: Serious morning wood will push the cage forward and drag the strap along.

The combination of strap and cage itself, is also a sexy look. Depending on the location, just wearing the combo, can be a look in itself. For upcoming outdoor events especially in San Francisco where you can get away with it, the strap can work as an anchor point for belt pouches. Just don’t over load them! As said before, neoprene is stretchty and will sag when weighted too much.

One small drawback has the neoprene strap: The end of the strap is finished with a metal fitting. Since the strap is 35mm wide, it takes a bit of fiddling to get that end through the 27.5mm wide loops. Once the ends have been pushed through, the strap sits securely inside the loops on the base ring.

The Strap Ring used as an Anchor Point for Mr S Harnesses, left with a Standard Carabiner, right with a Scissor Snap

A probably unintended but nifty use case is using the Strap Ring as a cockring anchoring point for harnesses with downward straps like the Mr S Trojan leather harness or Neoprene Crossbow harness. There used to be straps to put around cockrings to anchor these harnesses onto something when you wear gear without belt loops like sportswear or preferred a tighter V pointing straight to your junk. But they vanished some time ago. You can substitute these straps by using the Strap Ring as a cockring and snap the harness’ carabiners into the loops. If you want to do this, I highly recommend getting an at least one size larger ringer than you would get for locking your dick. Generally, a chastity cage base ring is a bit smaller than a cockring you wear for fucking all night long. Clipping your harness into the Strap Ring works best when the harness has scissor snap hooks on the end. Mr S used to only work with these kind of carabiners. A couple of years ago they started using standard carabineres where the lever can making opening a bit tricky.

Conclusion: Perfect combo to keep your massive chastity package close to your body.  
Pro Cons Where to get Price  
Solution to keep even the largest and heaviest chastity packages close to the body Strap ends are a bit too wide to thread easily through the loops Strap Ring $75
Mr S Neoprene Strap $30
Perfect for pairing with groin strap harnesses

Viper Chastity Cage

The Kink3D Viper Chasitity Cage in Size R+ Wide with a Curved Base Ring

Vendor: Kink3D

In the past years, Locktober and NOvember have become cornerstones of the gay kinky (social media) calendar. If I look at the page views of my articles about chastity and the reader questions of the past 6 weeks (especially since Folsom Europe), chastity clearly has been on peoples’ minds! At the end of September last year I have reviewed the Kink3D Cobra, the probably most widely used male chastity cage in the world right now. In the lead up to the most locked season of the year, I am reviewing Kink3D’s newest chastity cage, the Viper.

Since the basic construction of both cages are the same, it will be more of a comparative review, highlighting difference between the two cages so you can decide which one is best for you. In my initial review and in-depth follow up, I explored at length the potential and different different play styles of chastity. So if you are new to this kind of play, I highly recommend reading those two articles first. If you are already a seasons chastee or have a Cobra and think about upgrading, dive in straight away.

If you live in Europe and want to start your chastity journey Locktober 1st, Kink3D has some local retailers in the EU now. So the toys ship quicker and you don’t have to deal with customs. I personally recommend VAST in Dortmund, because they have a large selection both in store and online. So if after a couple of days you realize that you need a smaller or larger base ring or even differently sized cage, they can quickly get you setup so you make it through the month securely and comfortably.

Construction

There are two general designs for male chastity devices: The belt-style which goes around the waist and through the groin like a piece of underwear and the cuff-barrel-style which just goes over the dick itself. The Viper – like the Cobra – follows the latter design principle.

The Kink3D Viper above the Cobra. Notice the Wider gap between the Base Ring and the Cage on the Viper

For the Viper, Kink3D completely re-designed the barrel-style cage. While the Cobra had an open design of different interconnected struts creating a cage-like look, at the Viper different panels create an almost completely closed barrel with just slots for ventilation, easier cleaning and pissing. To mark the transition from the shaft to the glans section, the Viper has a small reinforced ring but only opens up about a millimeter more in diameter. The Cobra had a distinctly bigger section for the glans. Both cage styles have the same connection mechanism to the base ring with a shackle which goes into the lock house and two studs which go into holes inside the base ring.

Both my cages are size R+ Wide. To my surprise, the Viper is actually considerably larger than the similarly sized Cobra! Since it is difficult to measure inside the cage, I am comparing outside measurements. Due to both cages having a wall strength of 4mm, it gives you an impression how much larger the Viper is compared to the Cobra. Both have an initial exterior width of 52mm. But while the Cobra tapers to 44mm before the glans section, the Viper tapers to 49mm which is about 11% wider! Attached to the base ring, the Viper offers also 5mm more length than the Cobra due to a wider gap between the cage and the base ring. This gives your balls a bit more space, good if you have meaty balls like mine, but also makes balls slipping through more easily. So you might need a differently shaped base ring. This larger space in combination with the gradual transition from shaft to glans section means that dick sits a bit more freely inside the Viper. Regardless which cage you choose, for a comfortable and satisfying long-term chastity experience, the cage needs to be the correct size! To achieve this, Kink3D offers both cage and base ring in various sizes. To find the right size for your dick, I have written a detailed section about finding the right cage and base ring size for you in my Cobra review.

Left the Kink3D Cobra, right the Viper. Despite both being R+ Wide Size, the Viper’s Shaft tapers less and the Glans Section is Bigger

Detail of the Connection Studs & Locking Shackle on the Cage and Holes and Lock House on the Base Ring

To attach the cage to the body, a base ring is put over dick and balls, like a cockring. The basering is slightly oval for a better anatomical fit. At the top of the ring sits the lock house and two hole which connect with the studs on the cage itself. This was, cage and ring align perfectly, firmly and securely. But even when aligned perfectly, putting the lock in and actually locking it, can be a bit tricky. It takes some patience and some experience to quickly lock the ring onto the cage. The ring come in three designs: Standard which are just straight, XD which are slightly thicker to decrease the gap between the ring and the balls to prevent small balls from slipping through and curved which are cureved backwards if you have meatier balls. The Viper shares the same base ring with the Cobra. So you can mix and match colors and designs, like the waist strap rings. This ring is a recently introduced collaboration with Mr S Leather in San Francisco. The ring has two lugs on top to thread a neoprene or leather belt through which pulls the chastity cage upwards and tighter to your body. I have not played with this combination yet so I cannot judge how it effects long-term comfort and wearability.

The Currently Available Colors, missing the White which I have somehow lost

Like all toys from Kink3D the Viper is 3D printed made out of PA12 nylon. While being more expensive than other polymers for 3D printing, it is considerably sturdier, an important feat for chastity cages which are subjected to a lot of physical stress through movement, moisture and warmth. The panels the cage is made out of are 4mm thick giving the cage a solid, high quality feel without any flex. This is thicker than the wall strength of metal cages and also thicker than most other polymer/ 3D printed cages. While the thick material makes the Viper a bit bulkier than other cages, I have not yet come across a genuine Kink3D cage which broke. Even after years of 24/7 usage, the Kink3D cages look, feel and work like the day they were first locked around your dick. All pictures of cracked and broken cages which have been sent to me, have turned out to be from cheap knock-offs.

The Basering, Lock & Cage – the Three Base Elements of the Kink3D Chastity Experience

Another testament to the great quality is the overall finish of the Viper. Unlike with other 3D printed toys, you cannot see the stepping. The surface is smooth, in a slink-mat finish. It is warm to the touch, easy to clean and does not attract finger prints. All edges are rounded and deburred to prevent chafing even during long-term wear.

The Viper comes with a standard Burg-Wächter internal lock which are keyed-alike. So the same keys which fit my lock from the 2024 Cobra also fit my 2025 Viper. This is good for my chastity play style where I always need a key close at hand. But if you want to securely lock your bottom, you can either get an individually keyed lock for $25, a seal secured key safe or a 3D printed seal secured lock replacement called Airlock. This sealed lock stud is actually the safest way to lock the chastity onto your bottom because a moderately skilled lock picker can pick the lock with a paper clip.

Long-term Wearing & CBT in the cage

As you would expect, the Viper is “just” a differently designed Cobra who shares the same great level of production quality. This makes the Viper like the Cobra the best cuff-barrel-style chastity cage currently available. If you find the right cage size and base ring, the ergonomic design makes the cage almost unnoticeable. This is even more true to the Viper than for the Cobra. Since your dick is almost encased in the polymere tube, you even feel less. With the Cobra, you might feel a bit of chafing of your underwear or skin folds getting caught at a strut when getting hard. In the Viper you of course feel your hard-on struggling against the material. But except that, you feel nothing. This is an eerie feeling. You certainly feel that there is an object between your legs. But you just feel the object, not what is contained inside. The Viper is a bit more noticeable than the Cobra since it is a bit bulkier and heavier. But still, after wearing it for a couple of days, the feeding fades away and the cage becomes a part of your body.

Look Inside the Viper’s Barrel

While being a bit bulkier and more protruding, the Viper is still unnoticeable for the untrained eye. Below chinos and jeans or even thin cloth suit trousers, you cannot tell the difference between a big package and a chastity bulge. Of course, through jockstraps, singlets, tight-fitting rubber or speedos, you can clearly tell what you are wearing.

Like last year, I gave this new cage an airport security test flying to the USA. Neither German nor US security noticed the cage, neither on a body scanner, nor during a pad down because my Engelbert Strauss pants have to bulky pockets. If you run into issues, you can always claim that it is a medical device. If that does not work, I recommend traveling with the key to unlock if asked. While technically not illegal, the security can detain you if they want to. Having your dick locked 24/7 is not worth missing a flight.

As an uncut guy with a PA, I like that the Viper is a bit more spacious. With the Cobra, my piercing would sometimes get lodged between the bars. If that happened as an unlucky angle, the piercing would jam my frenulum against the firm cage, causing extreme pain! Inside the Viper, my dick is well contained and content. In all the month wearing the cage, I never had to adjust my dick inside the cage.

The Viper’s Sexy Silhouette which Reminds me of Super Cars

Pissing was also easier with the Viper. Due to physics, the tip of the dick is drawn to openings. Since there is only one up from, my foreskin opening usually aligned fairly well with it. And if not, it is the only outpour there is, guiding the stream. Nevertheless, pissing when caged is still a bit of gamble. I felt confident enough to use a pissoir with the Viper and mostly did not wet my pants in the process – but sometimes disaster happened. So if you want to be completely safe, sit down pissing.

Since there are almost no holes, you really have to take the Viper off for cleaning. Especially when you are cut, you could wear the Cobra almost indefinitely because water and soap could reach every spot. With the Viper, I recommend taking the cage off once a week. If you are a smell fetishist, the Viper is definitively for you! The precum, piss and sweat quickly create a rich aroma inside the barrel. A friend of mine puts the cage in front of a gas mask hose when milking his chastity sub so he can enjoy his own musk.

Being almost closed off completely, you can also play less with the dick inside. While I could fit pad electrodes inside the cage, getting the wires out proofed impossible. Wax play does not work at all and sounding is very hard. If the piss slit does not perfectly align, there is little way to get a hold off the dick to nudge it in the right place. You can also not apply lateral pressure when the sound pushes the dick a bit back. Cumming inside the cage is also more difficult. The holes up front are a bit wider than in the Cobra. But frenulum stimulation is more difficult. What works better than in the Cobra is applying vibrations. The barrel is better at transmitting the vibrations than the Cobra’s cage bars.

The Additional Space a Curved gives your Balls in the Right vs. a Standard Ring on the Left

Speaking of “play”, there are some… characters in the community who will punch you into your balls “because you obviously like it.” This is pretty dangerous when wearing a chastity cage! The exposing of the balls and leverage of the ring and the pressure the firm and sturdy cage can put on the testicles can lead to serious injuries, resulting in losing your balls in the worst case! So if you are a dom, top or sadist don’t be an asshole and ask for consent before busting somebody’s balls.

While technically is it possible to controlled busting somebody’s balls while he is locked in the Viper, it takes some practice and precise targeting. I would only recommend doing it with toys of the fist. Nut kicks are simply to random for this.

Conclusion: Comfortable and even more secure chastity for long-term wear
Pro Cons Toy Price
Large range of possible sizes for perfect fit Lock is a bit difficult to insert Kits (including cage, base ring & lock) $190 – $240
Can be worn over extended periods of time Has to be taken off for cleaning
Completely sealed of for less stimulation Cage $145 – $190
Very well made
Sturdy Base Ring $45 – $65
Randomized Lock $25
Airlock $15
Single Key Sleeve $25 – $30
Double Key Sleeve $30 – $35

 

Cobra Chastity Cage

The Kink3D Cobra with the Key Sleeve and Nether Nudger

Vendor: Kink3D

Welcome back – earlier than expected. Ever since I posted the first pic of my Cobra on Insta and Twitter my inbox has been exploding! In the over 12 years I have been reviewing BDSM and kink toys I have never had so much interest in a toy, been asked particular questions or been urged to quickly publish a review before Locktober begins.

I am not a person to quickly reach a verdict about a toy, especially about one that has been designed for long-term wear (and one for reasons explained below I currently cannot wear for extended periods of time). But again I am humbled by the trust you put into my thoughts so this will be a first more or less in-depth look that I will probably follow-up in a couple of months with additional thought.

Construction

The Kink3D Cobra is a 3D printed cage made out PA12 nylon. This material is on the sturdier and also pricier end of the printing material market. Currently Kink3D offers cages and accessories made out of black, hot pink and aqua blue. I have gotten many questions when why they don’t offer red or lime green ones (talking about summer of the brat) which I have forwarded to Kink3D. What I can assume with my limited 3D printing knowledge that color pigments can effect the sturdiness of the material. So probably some R&D is necessary before new colors can be introduced.

The different Colors Kink3D offers: Black, Fusion Pink and Aqua Blue

The material strength is about 4mm in the middle of the beams making them thicker than the many other 3D printed genuine designs and let alone Cobra knock-offs from China. Due to the material strength the cage is slightly bulkier than delicate metal cage designs but actually lighter than most titanium cages. Stainless steel cages are weighing multiple times of the Cobra. But like with metal cages, when you compress the Cobra with your hands, there is no flex. Because of the heavy duty design I have never received a messages about a broken Cobra cage on my website. Due to the warmth, moisture and constant mechanical stress especially the points where beams meet are prone to breaking. This is especially the case with thinner built polymer cages or if cheaper material are used. I could create a coffee table book with pictures of broken cages I have been sent in the last three years when 3D printed chastity cages really took off.

Another indicator of the great build quality of the surface finish. There are no rough edges or pinpoints. The surface is covered in a semi-gloss smooth texture that is easy to clean, does not leave finger prints and feels warm to the touch.

The design is a traditional three piece design with the cage itself, the base ring and an internal lock. As a standard the locks are keyed alike. But for $25 you can order a randomized lock if you really want to feel secure and helpless. Though truth to be told since the lock is rather small it can be picked very easily by a moderately skilled lock pick. During Folsom Europe I have talked to a few lock picking kinksters regarding the Cobra’s internal lock. It turns out the challenge apparently is picking a lock parallel to your body literally locked in your crotch.

Putting on the Cobra

You start with putting the base ring on. My recommendation is going balls first and then squeeze the dick through. Then you put the cage over your shaft. If skin gets caught, use their Nether Nudger to adjust (see below). When joining the cage and base ring, note that the pins on the cage are not only for guiding but also for sturdily connecting both parts. If the pins are not completely sunken into the holes of the base ring, the lock will not fit! This was actually the biggest misunderstanding when I firstly put on the cage myself. I thought they should only align. But it they the cage does not meet the base ring, the lock cannot be pushed through the entire lock house.

The GUiding Pins need to be Pushed Completely into the Holes on the Base Ring. Otherwise the Lock cannot be pushed through

Speaking of the lock, that is a bit of a challenge to put in. It twists very easily to the shackle jams inside the lock house. Until now I have not found a good way to insert the lock. If I guide it holding the key, the shackle will flip; if I guide it on the lock, the heavy head of the key turns the lock involuntarily, jaming the shackle. But since you are probably not unlocking so often as I do (again, see below), this does not matter as much.

What surprised me in the review process how comfortable you can wear the Cobra even when having a bush. Of course, you need to make sure that hair is not caught between the guiding pins and the holes or inside the lock house. But other than that there is little chance of pinching and tugging.

Sizes & Sizing

At the moment Cobra offers 8 different sizes both in a standard and wide version. In order to determine your size, measure your flaccid dick from the base to the tip. When you are like me and have a meatier dick or want to wear a large piercing inside the cage, go for the wide version. Over the past decade I have tried many chastity cages and they were all too narrow to house my large foreskin covered glans, let alone with a 8x15x12mm piercing. But the Cobra R Wide is so spacious that I almost don’t notice the cage when being soft. Picking the right size is important: If the cage is too long, the glans sit in the shaft tube instead of the bulges head section. If the cage is too short, it can uncomfortably compress your dick, seriously reducing the long-term wear potential. You can find the cage size imprinted on the inside below the locking ring.

There are 8 sizes of base rings which again cover a really wide range of package sizes. Though ending at 60.3mm width I know at least a few big boys who need a larger one. But I am certain Kink3D can accommodate even thick members of the gay community. The ring size is imprinted in the nudge where the locking ring of the cage enters the lock house of the base ring.

The rings are slightly compressed at the tops and elongated at the sides for a rough egg shape. This shape is more anatomically correct and reduces pressure and leverage when moving.

To even further accommodate different anatomies every size is available in three versions: Standard is a simple round 8mm thick round piece of polymer. The XD has an oval intersection with a depth of 10.5mm. This way the gap between the cage base ring is even small. When you have very small, mobile or tight balls this might be the right one for you. If you are like me and have meatier balls or and testicle prosthesis, Kink3D offer also Curved rings which bend 5mm backwards following the anatomically shape of your taint. It reduces the pressure on the balls. By widening the gap from 11mm to 16mm smaller balls can of course more easily slip through the crack.

The Roughly Egg Shaped Base Ring

Choosing the right ring size and is a bit trickier. Your cockring is a good size reference. Though through the egg-shape the behavior of a base ring can be different. The task of the base ring is different than a cockring: The base ring should comfortably and securely keep the Cobra attached to your body without you being able to pull the dick out or a ball slipping through. A cockring should keep the blood inside your penis. Prolonging an erection while being locked in a chastity cage is actually an adverse effect. So especially when you are a grower start with a larger size. Furthermore, depending in your form of day, how full your balls get over time during chastity and the environment (warmer temperatures and higher humidity will make the ball sack looser) your testicles will looks, feel and behave differently. So you might need two or more rings for a perfect fit in different situations or seasons.

If you have the possibility to try out different base rings, I strongly recommend doing it! This is only a snapshot but gives you a good impression if the ring is too tight. The gold standard is trying the base ring with a fitting cage. Since the ring and the cage are connected, the cage exerts leverage on the base ring, pulling it forward and upward. This movement and pull can obstruct circulation to taint and balls. If you feel a burning or tingling sensation in your balls or on your taint, you should take off the cage and try a larger and/ or curved base ring. Constant pressure on your taint and balls can cause lasting irritations on your balls which can lead to serious injuries, especially when the seminal ducts or epididimys are effected.

This is actually the case with my testicle prosthesis: Over time the standard #4 ring put pressure on my cyborg ball and obstructing circulation. As an experienced kinkster who can differentiate between different kinds of pain and knowing that nothing down their could actually necrotize, I placed the pain sensation in the “annoying”, not the “dangerous” category and wore the cage until it got too annoying. Sometimes these were 12 hours, sometimes four hours. The pain was so annoying that I could not fall asleep. Because of this for the review I spent some days and some nights locked but never managed a full 24h. During Folsom Europe a friend pushed me as a virtual key holder to go locked and chaste as long a possible over a couple of days. Despite having the opportunity and indeed order to unlock when it became too uncomfortable I was a good boy and pushed myself until I got released in a scene on Sunday. This push irritate the nerves on my scrotum which are still recovering from the implantation surgery so much that I could not lock for a couple of days. Of course this a borderline case which luckily only effects very few men. But it illustrates well the importance of a correctly fitting base ring! And it also shows the paramount rule of chastity: Physical and mental health comes first!

So my next steps will probably getting a couple of new rings (#4 Curved, #5 and #5 Curved) and see how much I can push myself. You will read all about it in the update in a couple of months.

Long-term Wearing & CBT in the cage

Despite not going for really long streaks, I have had enough wearing experience to give your a glimpse into being locked 24/7 in a Cobra.

The most important aspect of a chastity cage is “How secure is it?” I would place the Cobra on the securer end of the security spectrum. If it is really well-fitted, it is almost impossible to pull the dick out. This is especially true when you are wearing a large piercing. It takes a bit of practice and twisting and turning the cage to get the piercing nicely rested in the head segment. Since you cannot twist the cage while being connected to the base ring, it is impossible to get a large piercing out of the head segment while being locked. For added safety you can of course use a PA lock when you are uncut.

Different Nudging Tools

How a Prince Albert piercing behaves inside the Cobra was actually one of the most often asked reader questions. To be frank, I was surprised how well and easy they both played together. When I got the cage, I was wearing an 8x19x14mm screw in ball, meaning the external diameter of the piercing was 35mm. That was a border line size for the R Wide! It was wearable but required some adjustment throughout the day. The piercing would twist, lock in place and put uncomfortable pressure on my foreskin. Since the piercing was so large it could barely move, I had to take the cage off in most instances. Since sizing down to 8x15x12mm I can easily adjust while wearing the cage using Kink3D Nether Nudger. This is a small 3D printed pin you can wear in your key chain. Especially for meatier and uncut guys, I consider this $10 accessory an essential – regardless if you have a piercing or not! It helps you push the skin in the right direction or adjust the piercing. When you are a grower or uncut, the skin folds sometimes get caught when getting hard or getting soft, leading to really uncomfortable pinching! The tip of the Nether Nudger helps to adjust and push the skin into place. Is is small and nimble enough to fit between the beams and long enough to reach even hard to get-to spots. While you can in theory use other pins, I find the Nether Nudger the most handy tool. In times of need when mine was not at hand, I have used tooth picks (don’t try that at home!), Montblanc pens (kind of ok, but too wide) or keys (depending on the key either too points and scratchy or too wide to get anywhere). The best substitute I have found at my desk was a small mechanical pencil from Liberty, a British friend gifted me some 15 years ago. If you want to keep your kink classy, go for it. But the Nether Nudger fits the aesthetics, material and design of the Cobra better.

When you Cobra is well-fitted, you do not notice it at all as long as your dick stays soft! This is due to the light weight. Heavier cages, especially ones made out of stainless steel develop momentum when moving around. The Cobra is a very calm cage. Cheaper and older cages we locked by a pad-lock that could clink against the cage or its sharp edges and corners press into your lower abdomen. Having an integrated lock this irritation does not occur with the Cobra. So it is perfect to wear all day in almost every kind of cloths.

Despite the R Wide being on the larger end of the size scale, it is not really noticeable as a chastity cage. Most people will just identify it as a bulge. During the review process I have worn the Cobra under jeans and gym cloths, chinos and thin suit cloths with Nasty Pig or Addicted briefs. The structure of the cage does not print through the cloths so people, especially non-kinkster, don’t notice you wearing a cage. Even under .6mm rubber it is just a bulge, under .45mm you start to see structure. Under Speedos or tight fitting jockstraps it of course leaves an imprint.

The Sizing Emprinted in the Cage and Base Ring

When flying back from my US holiday this year, I put the Cobra to the travel test. Neither US nor British security noticed it. I both went through body scanners and metal detectors and it did not show up on any. When going through a body scanner the TSA guard checked my bulky double buckle belt from Mister B but let me go without any further inspection. A friend of mine is working at TSA. If you should face s strip search and are questioned about your chastity cage, he recommended calling it a medical device. But I doubt this piece of advice will not be needed often.

This discrete wearing is curse and gift as the same time. It takes a VERY trained eye to spot a cage below clothing, especially the smaller ones. There are some – and I have to restrain myself to not write a more strongly worded term – people in the community who find it funny to punch or kick subs into the nuts “because the obviously like it.” This is pretty dangerous when wearing the Cobra! The exposing of the balls and leverage of the ring and the pressure a the firm and sturdy cage can put on the testicles can lead to serious injuries, resulting in loosing your balls on the worst case! So if you are a dom, top or sadist don’t be an asshole and ask for consent before busting somebody’s balls.

While technically is it possible to controlled busting somebody’s balls while he is locked in the Cobra, it takes some practice and precise targeting. I would only recommend doing it with toys of the fist. Nut kicks are simply to random for this. Due to the open design, the dick can somewhat be played or tortured with. Wax comes off easily from the PA12 nylon and I have not noticed a tarnishing of the surface. If you are into e-stim, you can either fit conductive pads or 2mm loops inside the cage. In my experience the 4mm are too rigid. What I have done is fitting the Wide cage into smaller dicked boys and using the stainless steel electrodes from Oxballs. One really dexterous US friend of mine sounds his subs using silicone sounds while being locked in the cage. Long story short: The cage is sturdy and flexible enough to get creative.

The material does not resonate much and transfers vibrations fairly well onto the dick inside. For a caged milking, the dick should fill out the cage well. Otherwise the vibrations are not strong enough to stimulate the nerve endings enough to lead to an orgasm.

A Single Key Locked in the Double Key Sleeve

Keeping everything clean down there is easy when you are cut. The large space between the beams allow ample water and soap to keep your dick clean. To expedite the cleaning process, I recommend getting a shower head where you can choose different jet strength settings. Focused, slightly stronger jets makes washing the soap away easier. Uncut guys like me I would recommend unlocking at least every other day to clean below your foreskin. Since it is more compressed than flopping around uncut, piss cannot wash your glans, especially when messaging the last bit from under your foreskin. Because of this, residue piss also lingers a bit.

Taking the cage off for cleaning or adjustment can make self-unlocking necessary. If you don’t live together with your key holder or travel, I recommend getting the Key Sleeve. They are offered for single or double keys since each lock comes with two keys. I went for the double one. While a single key dangles inside the wide sleeve a bit, it is still locked securely. So with the double you have the option to lock one of both keys using numbered seals. The key sleeve comes with 10 seals. If you need more and unlock often due to the various reasons above I recommend buying them in lots of hundreds of eBay or Amazon.

Conclusion: Comfortable and secure chastity for long-term wear

Pro

Cons

Toy

Price

Large range of possible sizes for perfect fit

Lock is a bit difficult to insert

Kits (including cage, base ring & lock)

$170 – $240

Can be worn over extended periods of time

Very well made

Cage

$125 – $185

Sturdy

Base Ring

$45 – $65

Randomized Lock

$25

Nether Nudger

$10

Single Key Sleeve

$25 – $30

Double Key Sleeve

$30 – $35