Holy Trainer V4 chastity cage (bioresin)

This is the fourth version of the Holy Trainer. It has been refined to be smaller and easier to handle than the previous version, and the material is not petroleum-based plastic but a bioresin obtained from plants such as rapeseed and sugar. The material is stated to be made in Switzerland and assembled by local craftspeople.

A material with no petroleum-based plastic

Instead of ordinary plastic it uses a 100 percent plant-derived resin. It falls into no toxicity classification and is not an endocrine disruptor, which matters to anyone who thinks about materials in something that touches the genitals all day. The resin is clear and thick, so the strength is there as well.

It softens at body temperature

This material turns smooth and soft on the surface as it approaches around 36 degrees, that is, body temperature. It settles into the shape of the body while still blocking stimulation firmly, so it presses less during long wear. It is also not cold like metal in winter.

Five sizes and four rings

The size chart in the product photo lists five sizes, Nub 59mm, Nano 79mm, Small 85mm, Standard 95mm and Maxi 110mm, each with a second measurement of 22mm, 30mm, 40mm, 50mm and 63mm. Four base rings are included, so you can try them for fit once it arrives.

Before you use it

Resin gives you little to worry about in terms of allergy and is easy to clean, but it is not as hard as metal and is weak against a strong impact. The size you choose decides how it feels, so it is better to measure your relaxed length and circumference first. Cleaning is easy, but it is worth opening it once a day to wash the inside.