The Keen® Liberty™ Heel Trough Cushion | Model - HT-18x22 is designed to cradle the legs in contoured memory foam while floating the heels 2" off bed surface. It is often used with individuals with no mobility or those recovering from hip surgery. The Liberty™ Heel Trough also encourages neutral positioning for lower extremities. Sloped front design supports the knees to help prevent hyper extension. Can also be found paired with the Keen® Liberty™ Foot Drop Wall | Model – LFD making the Liberty™ Heel Complete Cushion | Model -HC2.