... Mde of nylon, filled with EPE foam which is waterproof.2. Pleece and resin cotton in collar for warmer and comfort. ... care goods : high flexible waist support ,splint waist belt ,cervical collar,neck supports ,adjustable knee support ,knee pad,medical knee support ... .....It has advanced machine to ensure goods being beautiful with good quality. It has skillful stitching workers to insure perfect ...