The Sinful Wrist Cuffs. Get kinky in pink with the Sinful line. These wrist cuffs are beautifully designed in faux leather laid over soft, high-grade neoprene for maximum comfort, yet solid restraint. Made of high quality, durable, and long lasting materials. Add a spark of excitement to your play time. Adjustable wrist restraints. Designed for extended wear. Made of vinyl, neoprene and nickel-free hardware.