Supervised by Hiroshi Katsuno, M.D. RAKU Knee Cushion The color in the image is light blue, but it is actually navy. The cross-section in the mail-order photo is triangular, but I think it's closer to a kōmori shape in reality. Color: Navy Size: Width approx. 34 cm Length approx. 25 cm Height approx. 20 cm Materials: Cover: Polyester Filling: Polyester Batting: Beads, Polystyrene Manufacturer: Meidai Lighten the burden on your lower back by sleeping with your knees bent. Fill the gap behind your knees when lying on your back to relax. By holding it between your knees, you can train your adductor muscles, and it is also expected to help prevent incontinence and correct bow legs. Can also be used as a backrest in the living room. Only the cover is washable. We appreciate your understanding that this is a used item. We will ship using Mercari's easy shipping service with recycled packaging.