Beds Up, Bed Elevating Inclined Insert, Twin Designed to fit into most headboard/footboard beds or Hollywood frames without adding stress. Set up and assembly is required. Night time relief from GERD, Hiatal Hernia, Heart Burn, Acid Reflux, Asthma, Nocturnal Cough, Ulcers Doctor Recommended - Safely and securely lifts the head of your bed 2", 4", or 6" Includes a center support leg and designed for years of use..will not break down like foam wedges Designed to sit under your foundation of box spring and built to last for years, will not work with a platform bed