BetterRest High Density Memory Foam Leg Elevation Wedge - Helps Relieve Discomfort from Lower Back Pain and Improves Circulation THERAPEUTIC. Ergonomically shaped polyurethane foam core elevates legs while the user is sitting or reclining in bed, removing pressure from the lower back and helping to improve circulation. Our high density grade foam will last you for years to come PREMIUM COMFORT. This premium leg support wedge utilizes BifomPad technology: a layer of memory foam over firm-support base foam. The memory foam layer creates a custom contour with the users body, for maximum comfort SIZE-MATCHED. This leg wedge pillow is available in four different sizes that can be selected to match the length of the users legs. Leg wedge helps users suffering from back pain, leg pain, varicose veins, phlebitis and restless leg syndrome WASHABLE. The cover is made with soft velour fabric that feels great against the skin and can be removed for laundering EXPANDABLE. Using this Deluxe Leg Wedge in conjunction with the BetterRest Memory Bed Wedge (sold separately) allows the user to achieve a zero-gravity position, minimizing pressure at all contact points