Edge Xtreme Under The Bed. The perfect bondage product! Includes 4 restraint straps secured to one connector strap that fits securely under your mattress. Restrains your partners arms and legs from the sides or bottom of the bed. Restraint strap quickly fits beneath any mattress with no hooks and adjusts to the size you desire. Easy setup on any mattress. Portable and great for a surprise getaway. Includes: 4 60 inches restraint straps, 1 60 inches connector strap. Materials: polypropylene webbing, plastic hardware, nickel free metal hardware Velboa fabric, Velcro.