Holy Trainer Nano V4 Male Chastity Device Review

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After wearing the Holy Trainer Nano V4 male chastity device for four days, I’m ready to render my verdict.

I’ve been eager to test and review the Holy Trainer Nano ever since I read Thumper’s review of the Nano V3 some time ago. He has declared, in his opinion, the Holy Trainer is the best off the shelf device available for guys first trying male chastity.

Also, since I’ve seen around the web how often the Holy Trainer and CB-6000 are touted as the best first devices for guys new to chastity, I was curious to see how the Holy Trainer stacked up against the CB-6000S, which I’ve already wear-tested and reviewed.

First Impressions

When the Holy Trainer Nano V4 arrived in my mailbox, I was impressed with it right out of the box. Unlike the CB-6000 with all its variable spacers and posts, the Holy Trainer device comes in only three pieces—the base ring, tube, and MagicLocker. Immediately I saw that the Nano was more ergonomic and futuristic looking than the CB-6000. The material the device is manufactured from is of great quality and has a nice smooth finish.

The Nano is the first Holy Trainer chastity device I’ve tried, but you can find images of the earlier models on the web, from the V1 through the V3. In comparison to the previous models, the V4 appears more sleek and ergonomic. It is evident that with each new iteration, Holy Trainer continues to find ways to make slight improvements to their basic design.

The V4 ring is wider and flatter than that of previous models, and the ergonomic design prevents it from sliding around. I haven’t liked the wider base rings I’ve tried before, like those that come with the CB-6000, but I loved the feel and fit of the Nano V4 ring as soon as I put it on.

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Holy Trainer Nano V4
Holy Trainer Nano V4 Doing Its Thing

Holy Trainer Nano V4Specs

Here are the specifications of the Nano I ordered.

Ring Size Options

I ordered my device with the 50mm (1.95 in.) base ring. Having the “high and tight” type scrotum, I find a 2-inch ring works best for me with most of the devices I’ve tried. I can get into smaller rings, but they tend to be uncomfortable. But for guys who need a different size, Holy Trainer offers five different base ring size options.

  • 36mm (1.41 inches)
  • 40mm (1.55 inches)
  • 45mm (1.75 inches)
  • 50mm (1.95 inches)
  • 55mm (2.14 inches)

 

Color Options

Besides black, which I ordered, the Nano standard color options include clear and “baby pink.” For an extra $20 charge, you can select from forty-two other custom colors.

How comfortable is the Nano?

With the possible exception of the Cherry Keeper chastity device I own, without a doubt, the Holy Trainer Nano V4 is the most comfortable chastity device I’ve ever worn. The device is feather-light in weight, but it feels solid and well made.

I believe the ring design is the biggest reason the device feels so comfortable. It is wider at the top and narrows toward the bottom. The ring is designed to be more compatible with men’s bodies and is wider and narrower at the right places, instead of being a perfect circle. The ergonomic design fit my scrotum perfectly.

The inside of the ring is extremely smooth and polished. I didn’t even have a hint of friction chafing from the moment I first put it on. As a precaution, I did apply a little lubricant inside the base ring when I first put it on, as I do with all new devices. But since I never had reason to reapply it, I’m confident it wasn’t needed.

The internal diameter of the Nano at 1.3 inches fit my penis flawlessly. The tube felt snug without being overly tight. The length at 1.41 inches was a little short for my average-sized penis and caused a slight turtling effect, but I found that comfortable and liked how the tip of my penis reached the end of the tube.

Frankly, I believe even a guy who has never worn a chastity device before could put on a Holy Trainer chastity device and wear it right out of the box for an extended time without any significant issues.

How Discrete is the Nano?

Once I tried it on for the first time, I found the Holy Trainer Nano left no real chastity bump footprint at all under jeans or athletic shorts. The small size and downward sloping attitude of the tube make it virtually unnoticeable.

Is the Nano Inescapable?

Here’s the deal. I’m very realistic when it comes to the inevitable escapability question concerning chastity devices. If you try hard enough, you can escape from any ball-trapping chastity device worn without a body piercing. The real question is how secure it is and how hard it would be to remove without unlocking. My answer is very. Of all the ball trapping cages I’ve tried, this one is up there with the best of them. There is only a small gap between the tube and ring.

The way the opening of the tube slides beneath the ring when the two parts are mated together makes it quite difficult to withdraw your flaccid penis from the tube when the device is locked.

I’ve found it easy to push the base ring away from my body a little and use my fingers to pull my soft peen out of the tube or cage with other devices. I attempted this with the Nano and was unable to do it. The chances of pulling out of this chastity device are slim unless you are determined to remove it.

I’d recommend going with the smallest base ring that feels comfortable for you for the best security. Selecting a ring size that’s too big with any device always affords the biggest opportunity to escape.

How Hygienic is the Nano?

By its nature, as an enclosed tube device, it is very difficult to keep your penis properly cleaned while you wear the Nano. The urination opening at the end of the tube is the only real option for getting soap and water inside the tube.

Hygiene is very important to me. If I were going to wear the Holy Trainer Nano for an extended period, I’d remove it at least every four or five days to do a proper cleaning. That’s why for extended periods of chastity, I prefer open cage-type chastity devices that allow me to keep clean using only my handheld shower head.

Urination

Holy Trainer device tubes offer a generously sized urination outlet. That made me hopeful I might be able to pee normally while standing. The first couple of times I tried it, it worked like a champ. But flaccid penises are always in a constant state of flux, expanding and contracting.

At one point, when mine contracted and had pulled back a little from the end of the tube when I urinated, the stream caught the edge of the inside of the tube just enough to make a real splash mess. So, as with most chastity devices, expect to sit while peeing if you wish to err on the side of caution.

The point here is that the Nano, like most devices, will retain some urine dribbles inside. That will necessitate proper and regular cleaning beyond the shower if you don’t want to walk around smelling of stale pee.

As far as keeping the Nano clean, the design and materials used make it easy to clean when you’re not wearing it. To wash it, you can use soap under the tap or put the chastity device in the dishwasher. According to the manufacturer, the bio-resin material is very strong and will withstand exposure to alcohol or any other solvent.

Conclusion and Recommendation

The Holy Trainer Nano V4 is super comfortable to wear, lightweight but robust, and should last a long time. The size should fit most guys with average-sized penises well. If you need something longer, you always have the option of going to one of the other Holy Trainer models—the Small (1.73 inches), the Standard (2.14 inches), or the Maxi (2.75 inches). If you want to go smaller, there is the micro-chastity Nub (1 inch), which I’m even more eager to try now.

The ergonomic base ring is comfortable and sits well against my body. The device feels solid and secure despite the welcome light weight. I slept comfortably wearing the Nano from the first night. According to Holy Trainer, the tube is designed to discourage nighttime erections. It isn’t something I have a problem with anyway, but I didn’t awake with any nocturnal erections while wearing the device.

The Holy Trainer Nano V4 is super comfortable to wear, lightweight but robust, and should last a long time. The size should fit most guys with average-sized penises well. If you need something longer, you always have the option of going to one of the other Holy Trainer models—the Small (1.73 inches), the Standard (2.14 inches), or the Maxi (2.75 inches). If you want to go smaller, there is the micro-chastity Nub (1 inch), which I’m even more eager to try now.

The ergonomic base ring is comfortable and sits well against my body. The device feels solid and secure despite the welcome lightweight. I slept comfortably wearing the Nano from the first night. According to Holy Trainer, the tube is designed to discourage nighttime erections. It isn’t something I have a problem with anyway, but I didn’t awake with any nocturnal erections while wearing the device.

Price

At the price point of $165, the Holy Trainer chastity devices, while comparable in price with the CB-6000, aren’t cheap compared to all the cheap chastity devices available from Chinese manufacturers these days. But for those who want to be careful and want only the best quality stuff to contain the most sensitive part of their anatomies, I think the Holy Trainer devices represent a good value for the money.

You can buy the Holy Trainer tubes ($96) and rings ($48) separately if you don’t want to buy the set at $165. That’s great because you don’t have to buy a whole new device if something happened to the tube or you find you need a ring of a different size. Also, like me, if you plan to try a different Holy Trainer device, you can just buy a different tube for $96 instead of a new complete device. That’s how I’ll acquire my Holy Trainer Nub for review. You can see all the prices here.

Replacement MagicLockers are also available from Holy Trainer for $23. These are quality locks, unlike the knockoffs you get with cheaper chastity devices. The keys are stamped with HT, but the lock looks and feels like a Burg Wachter.

As a final note on Holy Trainer components, while you can interchange V4 rings and tubes, if you have one of the earlier Holy Trainer models, those parts will NOT work with the V4.

Recommendation

The Nano is a durable, good-looking device that shouldn’t cause most guys any trouble at all, even those entirely new to wearing chastity devices. If I weren’t so sold on the look and feel of stainless steel devices, I could easily make the Holy Trainer Nano my regular device without a second thought.

I find I must agree with the Holy Trainer claim that they may have designed the CB killer. Sold at a comparable price to the CB-6000, the Holy Trainer chastity devices passes all the tests.

After wear-testing both devices, I recommend the Holy Trainer over the CB-6000 hands down to any guy looking to dip a toe into male chastity for the first time. Light and very discrete compared to many stainless steel devices, the Holy Trainer Nano provides superior comfort while offering the same level of security and the impossibility of stimulating the penis.

Catch you at the next review!

Disclaimer: As always, this review represents my own opinions. I did not receive compensation or any consideration from anyone for this review. I purchased the reviewed device with my own funds.