Yosoo Travel Knee Ease Pillow Comforts Sleeping Back Leg Pain Support Cover Bed Health Material: Sponge filling and pure cotton cloth cover Size: 20 x 11 x 11cm(7.87*4.33*4.33inch), color: white Mulit- funtion pillow that can help soothe lower back pain or arthritic joints. The pillow gently straps in place and moulds to your shape. It fits for when you lie on the side clamp knee, ankle pads, wrist pads, prone head pad and so on.