Introducing biothane rubber a virtually indestructible material. Biothane is embedded with a metal mesh making it much stronger that traditional rubber. It will not tear, crack, fade or break. It also cleans with soap and water and does not require any maintenance like most leather items. Biothane is also non sticky and has a much more pleasant smell than most rubber products. These ankle restraints are fully adjustable and come in a red and black or yellow and black color combination or in all black. The heavy duty steel hardware ensures that your partner stays just where you want them.