An under the bed bondage kit is a system which works by fitting restraint straps underneath a mattress or bed frame without the need for hooks. This allows cuffs to be attached and your partner to be restrained by the arms and legs without damaging the bed frame, and can be tucked beneath the mattress when not in use. Under the bed bondage kits often have the advantage of being portable, allowing you to enjoy your BDSM toys no matter where you are.