The Elevating Leg Wedge is an ideal support cushion for any lower extremity injury or surgery. It also helps treat tired legs, phlebitis, varicose veins, lower back pain, swollen knees, and pelvic traction. It reduces stress on the spine and improves circulation. The contoured shape allows it to fit under the back of the knees and elevate the legs. White polyester/cotton blend cover is removable and washable.