The perfect education collar:
This anatomically shaped posture collar is made of 3mm thick black natural rubber.
You can attach handcuffs or a chain to the sturdy 40mm metal D-ring for example.
The width of the collar varies between 80mm and 110mm, and in the neck has an adjustable closure with 2 buckles.
So that the collar cannot be taken off, the buckles can optionally be equipped with an eyelet for closing and secured with padlocks.

To ensure that this collar fits perfectly, please refer to the size chart.