KingPavonini Adjustable Leg Height Pillow Ideal for Everyday Use. The U-shaped groove is wide enough to support your both legs and prevent legs from sliding and falling suitable for recovery after post surgery. It can also be used to elevate the legs during rest or sleep relieving leg pressure back pain and sciatica pain. We designed this legs pillow with a variety of adjustable height so that you can according to your height to choose the suitable elevating height. For a lower height just take off the bottom layer; For a higher height just add the top pad. This leg pillow can be used not only as a flat top pillow but also as a U-shaped top pillow to meet your different needs.