Perfect for post hip surgery or arthritis of the hip or knees Bio Up cushion adds 4” of height to any chair. Enjoy having the freedom to move about and be able to sit and stand without assistance. The Bio Up allows post hip surgery patients to rise without fear of hip dislocation resulting in additional surgery. It positions hips and knees at 90°, rising from a seated position easier. The Bio Up Cushion comes with a handy carry strap. Comfortable to sit on and cover with machine washable fabric.