One items of our available orthopedic softgoods. Home use without conducting a doctor,very convenience. 2.5mm neoprene with double sides laminated nylon jersey,nylon jersey is 4 sides elasticity.Aluminum stay inside for easy bend and unbend,for better support.elastic strap for fasten system,easy to be worn and adjust the length.Oval shaped ventilation hole leads to good ventilation.PE foam ...