Bondage Belt Restraint System The Bondage Belt Restraint System will turn your bedroom into the ultimate fun zone. For beginners or pros in the bondage play world, buckle in and enjoy the ride. The belt adjusts to fit up to 40" waist. Kit contains adjustable waist belt and under the mattress strap, 2 wrist cuffs, 2 ankle cuffs, 4 adjustable tethers, and a FREE leather flogger, satin mask and sex dice as a special bonus.