Prevalon Heel Protector II. Heels are a vulnerable area for bedsores, also known as pressure injuries. Prevalon Heel Protector II keeps the heel off the mattress to relieve pressure for individuals spending a lot of time in bed. Soft, adjustable straps position the foot and ankle securely, leaving the toes and heel exposed. The ambidextrous design fits either foot and the comfort-grip interior helps keep the foot in place. Fits calf circumference 10" - 18". 2/case.