COMMAND. Made to Play Hard. Under-Mattress Bondage Straps transform your bed into a bondage playground. Designed to slip securely under your mattress, the thick, durable industrial-strength nylon straps attach to four sturdy Heavy-Duty Cuffs with adjustable stainless steel lock rings, allowing for a controlled, custom fit every time. (No bed posts or headboard required.) Who is in COMMAND? The COMMAND Collection is for serious BDSM connoisseurs who demand the best. COMMAND components are forged from stainless steel and solid rivets, allowing for extreme fetish play. Professional-grade carabiners support hardcore play and ensure complete control. The strategic V-Ring design offers further control and lessens slipping associated with average O-Rings. Use the carabiners to link Heavy-Duty Cuffs end-to-end to wear as a collar or thigh cuff. The Under-Mattress Bondage Straps are interchangeable with other COMMAND products for optimum versatility. Phthalates Free. Material: Stainless Steel