The Holy Trainer Nub V4—A light-weight resin male chastity device that's perfect for the micro chastity enthusiast.
Based on my travels around the web this past year, it seems that micro chastity may very well be the most popular segment of the male chastity device market. There are lots of models available in almost any material you might imagine. I own several micro chastity devices myself, including the Holy Trainer Nub V4 version, which is the focus of today’s male chastity device review. I’ve actually had this device since late March 2021 and finally made the time to wear test and review it. So, if you haven’t had the chance to try the Nub, here is your chance to see what all this device offers.
Holy Trainer Nub V4 Chastity Device Physical Details
Holy Trainer manufacturers the Nub V4 model from a bio-based resin that the company claims is one hundred percent natural and resistant to all detergents and solvents. The ergonomic design aims to offer wearers a device that provides both security and comfortable long-term wear. As shown in the specifications above, with five distinct ring sizes available, all Holy Trainer male chastity devices, including the Nub, suit the unique morphologies of most chastity device wearers right off the shelf. The rings are wide and designed to fit the male anatomy perfectly. If you purchase an original Nub directly from Holy Trainer, the device comes with only one ring, so you must select the proper size. You can find Holy Trainer’s sizing guide here. Like all Holy Trainer male chastity device models, they offer the Nub in three standard colors—black, pink and clear. For an additional charge of $20 USD, Holy Trainer offers all their models in over forty-five custom colors. Choosing a custom color adds twelve days of manufacturing time before Holy Trainer ships the device. The company also offers some additional customization options here, including an accommodation for those with a PA piercing.
Holy Trainer Nub V4 Chastity Device Use
The Holy Trainer Nub V4, like all the company’s device models, is a standard ball-trapping device. The wearer first inserts his scrotum and testicles into the ring and once he has positioned the receiver at the top above the base of the penis, he slides the tube into the channel to mate the two primary components together and then secures the device with the provided MagicLocker that comes with two keys. It’s a simple, innovative design that works effectively. I also own a Nano model, which I find secure. If anything, the Nub’s shorter tube (only one-inch), makes it even more secure. I think it would be extremely difficult if not impossible to remove the penis from the backside of the cage. At least I wasn’t able to accomplish it using a reasonable amount of effort. So, like the Nano, the Nub seems a reasonably secure device. I had no ball slippage issues with either Holy Trainer device. But, as always, I’ll give my standard disclaimer here. No ball-trapping male chastity device (without a PA piercing) is one-hundred percent secure. Someone motivated enough to escape one usually does.
Precautions to Be Taken While Wearing the Nub V4 Male Chastity Device
As with any ball-trapping male chastity device, choosing the proper size base ring is important. The worst that can happen if you choose a ring that’s too large is the locked device might come off or be too easily escaped. However, choosing a ring that is too small can cause significant problems, including compromising your circulation. As a rule of thumb, skin discoloration or skin temperature of the scrotum that feels cooler than normal body temperature are indications of reduced circulation. I don’t know how many images I’ve seen of men wearing chastity devices where their scrotums have turned dark blue or even purple. That’s no bueno. Wearing a base ring that interferes with circulation is asking for a serious medical issue. When you first put on a chastity device, your skin may turn a little red from the manipulation, but it should soon return to the normal color and your scrotum should never feel cold to the touch. When wearing a male chastity device, you should always be able to insert a fingertip between the base ring and your skin. If you can’t, the ring is too small. Also, if you are unaccustomed to wearing a chastity device, it’s a good practice to apply a little personal lubricant between the inner ring and your skin to avoid chaffing and tender spots that can make it uncomfortable to continue wearing the device.
Comfort and Feel of Wearing the Nub Male Chastity Device
Do I like the Nub? That’s really what most people want to know when they read a review. So, I won’t leave you in suspense. The Holy Trainer Nub V4 model is one of the most comfortable male chastity devices I’ve ever worn. It fits me like a glove. It’s so comfortable and light-weight, I forgot I was even wearing it in only a few minutes. Since I’ve been wearing chastity devices for a while, I know a two-inch base ring usually fits me best. So, I chose the 50 mm ring (1.95 inch) and it fit perfectly.
I also found the Nub aesthetically pleasing once I had locked it on and looked at it in a mirror. My penis disappeared completely, and all I had between my legs was tightly captured testicles and a piece of pink plastic. That makes the Nub supremely stealthy. Wearing only a pair of briefs, I had no chastity bump showing at all. Because it is so small, light-weight, and comfortable, the Nub is now my go-to chastity device for running and other exercise activities.
Hygiene Concerns When Wearing the Holy Trainer Nub
I always feel compelled to try urinating while standing when trying out a new male chastity device, even the micro chastity models. The Nub has a generously sized urination outlet, and I was careful to center my urethral opening with the urination outlet while putting on the device. But the design of the device means your urethral opening in pointed straight ahead. It might work okay with a urinal since the stream was unobstructed, but it didn’t work so well with a toilet. So, my advice is just sit to do your business the way it works best with other micro chastity devices.
Since the one-inch tube forces the penis to turtle back into the body, the one drawback with the Nub is it isn’t possible really to keep things as clean as you would like. The urination outlet is about the only place to introduce water and soap into the interior of the device. Since I’m something of a clean freak, I prefer to remove the device once a week for showering and cleaning the Nub itself properly. That isn’t a knock on the device, since every micro chastity device I’ve ever tried requires the same. The steel devices I generally wear are open type cages that make it snap to keep everything clean using my handheld shower head, and I rarely remove them for cleaning.
A Word About Nub Knockoffs
Since all the Holy Trainer models are so popular among male chastity enthusiasts, knockoffs abound all over the internet. There is even a steel model I saw available. I bought an authentic Nub that I wear tested for this review from the manufacturer. So, I have no knowledge or experience with the knockoff versions. I know they are considerably cheaper to buy and often come with up to four different size base rings. The one issue I’ve read on the internet about the knockoffs, and I’ve read it several places from different reviewers, is that at least some knockoffs have sharp edges on the receiver attached to the base ring that will actually cut your skin. Other than that, the usual considerations apply when buying a cheap copy. First, the material used by those making copies of the nub probably won’t be the all natural bio-resin that Holy Trainer uses. Next, the quality isn’t likely comparable. Finally, my device came with an authentic MagicLocker. Cheaper quality copies of the locking device will be supplied with knockoffs. I’ve had a few problems with those in the past and prefer the original MagicLocker. The $165 USD price Holy Trainer charges seemed reasonable to me, and I found it worth paying that price for the real deal. But I understand the temptation to grab a copy that may perform similarly for over a hundred dollars less.
Holy Trainer Nub V4 Final Thoughts
All in all, the Holy Trainer Nub is one impressive male chastity device. I really like the way things look when I have it locked on, and it has felt super comfortable from the first time I put it on. The one-inch tube, most of which slips inside the base ring, makes it impossible to cheat by accessing and stimulating the penis shaft. And as far as ball-trapping devices go, I find it quite secure. The available add-on for those with a PA piercing would make it even more secure. Having done several daily runs wearing the nub, I’ve retired the light-weight, 3D printed cage I was using for exercise before and will wear the Nub for running and other exercising from now on. If I wasn’t so sold on steel devices, I could easily imagine making the Nub my every day device.
