4 adjustable cuffs (fits 4-inch to 12-inch wrists), four 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 set-up on any mattress. Portable and great for a surprise getaway.