Ouch Reversible Collar and Wrist Cuffs Black. This collar with cuffs is 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 collar or cuffs around. The Neoprene side is colored and the PU leather side is black for a rougher look! Also it features a Velcro lock what means it will fit almost everyone, a snap closure system to assure it is interchangeable with other bondage toys! <br /><br />Specifications material side 1 Neoprene. Material side 2 polyurethane PU Leather. Diameter wrist cuffs 3.35 inches, diameter collar 5.91 inches. Length chain 29.5 inches. Velcro locks. Metal Snap closures.