We know these dont come cheap but when you know how much work it costs to get these right youll understand.
They have a nice thick rubber on the inside so they're comfortable to wear.
The cuff itself and the strap are fortified with a layer of canvas in between two layer of rubber so you cannot stretch them and pull the eyelets out or liberate yourself. These cuffs are therefore quite functional, though they cannot be used for heavy suspensiongames. Rubber is and remains rubber.