The NS Novelties Sinful Collar. Get kinky in pink with the Sinful line. The collar is made of stamped Vinyl around a Neoprene liner ensuring no unnecessary discomfort to your play partner. The high quality construction and materials ensures worry free repeated use. Add a spark of excitement to your play time. adjustable collar and leash. Designed for extended wear. Made of vinyl, neoprene and nickel-free hardware.