White cotton sateen laminated on (3/8)in foam. Nylon tricot lined for comfort and durability. 1 removable pre-shaped lateral and medial stay and 2 posterior stays for rigid immobilization. Alternating Velcro in loop-lock fashion gives desired adjustment. Comes with 2 adhesive foam strips and popliteal pad for perfect fit. Size; circumference 6in above and 6in below knee.