Holy Trainer V4 – new generation for 2020

(3 customer reviews)





Note: The following information has been copied from the Holy Trainer website. Aside from that, here is what we do know:

  • The dimensions of most models are slightly different.
  • Rings designs have been altered for greater comfort, however are thicker than V3. This may be an issue for men with a high and tight scrotum.
  • Position of Magic Lock has changed making it slightly more discrete.
  • This model has better ventilation.
  • Rings and cages are not interchangeable with earlier models, but the Magic Lock has not changed.

Description from Holy Trainer website:

Change the game with this (R)evolution

A more ergonomic & always more discreet design which offers an easy installation for a long term comfort.

Holy trainer v4 was the first brand to offer a MagicLocker to replace the traditional padlock. Since then, this closure system has been adopted by all competing products, which demonstrates its effectiveness!

With 5 tubes and 5 different rings, Holy Trainer v4 is the only brand to offer 25 assembly possibilities to suit all the morphologies of its customers.

5 ring sizes available – Holy Trainer V4 Version

# Diameter in mm Diameter in inch
0 36 mm 1.41 inch
1 40 mm 1.55 inch
3 45 mm 1.75 inch
5 50 mm 1.95 inch
6 55 mm 2.14 inch

5 tube sizes available – Holy Trainer V4 Version

# Model name Tube length Internal diameter
N Nub 26 mm – 1 inch 33 mm – 1.3 inch
0 Nano 36 mm – 1.41 inch 33 mm – 1.3 inch
1 Small 44 mm – 1.73 inch 33 mm – 1.3 inch
2 Standard 55 mm – 2.14 inch 33 mm – 1.3 inch
3 Maxi 70 mm – 2.75 inch 35 mm – 1.4 inch

An efficient and discreet chastity device

HolyTrainer will provide you with incredible ease of use and total security over a long period of time. Discover, through our website and our videos, the multiple innovations that have been made to chastity cages for men.

An innovative design

As for ergonomics, you just need to look at the ring to understand that its shape is perfectly suited to the male anatomy. Look closely at the device and its system of closure. The device is attached very easily and once the system has been closed, the tube is firmly attached to the ring.

A safety device

Its locking system and its materials makes it a product that is nearly indestructible. You can use the device during sports, sleep on your stomach or be attached to something. It will withstand all your desires while remaining firmly in place. Our Bio-resin will absorb any impacts without breaking and won’t cause injuries to the skin.

Nighttime erections

You know what happens with most chastity models. A nighttime erection pulls on the scrotum and causes pain on its base. With HolyTrainer and the ergonomic design of its ring, we guarantee you an excellent comfort without pain. In general, after 24 hours of use, you will have forgotten that you’re wearing a chastity device. The shape of the tube is also designed to discourage erections. Aimed downward, the orientation of the device does not favor stimulation. The chastity device remains very discrete beneath your underwears, even under close-fitting pants.

Hygiene & cleaning

The design and materials used makes it easy to clean. To wash it, you may simply use soap under the shower or put the chastity device in the dish washer. It is very strong and will withstand exposure to alcohol or any other solvent. The air holes allow a very good venting. The skin breathes well and the opening located at the end of the urethra makes it possible to urinate comfortably.

Use over a long period

Our device may be used by beginners or experienced users. Since the tube allows the skin to breath, it can be worn over a long period of time. The materials used are 100 % hypoallergenic and will be completely tolerated by the skin, even during a long period of use.


HolyTrainer comes with a small bag. You can place the HolyTrainer on the nightstand in complete discretion. But don’t be mistaken, even if the packaging is discreet and devout, its content will make you give up your sexual freedom with an iron fist. The device is provided with two keys and a “MagicLocker” made of brass that is resistant to water.

Additional information

Weight 0.35 lbs
Dimensions 4 × 3 × 3 in

Clear, Black, Baby Pink

Ring Size

36mm, 40mm, 45mm, 50mm, 55mm

Tube size

Nub, Nano, Small, Standard, Maxi

3 reviews for Holy Trainer V4 – new generation for 2020

  1. Stephen Fletcher

    Absolutely the best,I highly recommend this product,I wore the Chinese knockoff for 2 weeks,and actually developed swords because the product was poorly made, I received my Holy Trainer V4 yesterday and it is twenty thousand times more comfortable then any device I’ve ever wore and I have tried them all. This product is well worth the money you pay for it if you want long-term wear and comfort spend the money and get this product.

  2. Sara

    The version 4 rings are so much more comfortable than the previous versions. They have been flattened out which just seems to fit better. I have the V2 and V3 and cocks down this is the best.

  3. M.V.

    First, the shipping was phenomenally fast. I order just before Christmas, and it arrived in a couple of days. Well done KFH!

    Now, the V4 is my first Holy Trainer device, but not my first cage. I have normally used a CB-3000 I purchased in 2007, so it was time for an upgrade. I went with the standard ring and small tube. The small tube keeps the head of my penis up toward the cage’s opening, so I don’t have to worry about alignment when I urinate. The V4 is so much more comfortable than the CB-3000! I still get some soreness at night when I get attempted elections, but I got that with the CB-3000. When my body gets accustomed to the device. That sensation will go away. I like the fact that the V4 is much more compact. I don’t have to shift things around all day to get comfortable in pants. When flaccid, the cage feels like a gentle grasp on my penis, all day long! It is a constant and comfortable reminder for me.

    Putting the cage on is so much easier than the CB-3000. One, there are fewer pieces to fiddle with. The lock is common sense to insert and secure. Not having the padlock dangling around helps streamline the whole presentation as well.

    Like all cage devices, pull out is possible. I haven’t tried the anti pullout devices found here on KFH yet as I am still getting used to the V4 without.

    If you are trying to decide between devices, go with the V4. You will not be disappointed!

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