These cuffs are designed with a PU leather and a neoprene side, this allows you to choose the material you will feel on your skin by simply turning the cuffs around. The Neoprene side is colored and the leather side is black for a rougher look! Also they feature a Velcro lock which means they will fit almost everyone, and a snap-closure system to assure it's interchangeable with other bondage toys! <br /><br />Specifications: material side 1 Neoprene. Material side 2 polyurethane PU Leather. Diameter wrist cuffs 3.35 inches. Velcro locks. Metal snap closures. Dimensions 5.12 inches by 3.19 inches by 2.76 inches. From Shots America.