White cotton sateen on 3/8″ thick foam, nylon tricot lined. One each medial and lateral stays and two contoured posterior stays are removable. Alternating loop-lock straps close with hook and loop. Two adhesive foam strips and popliteal pad included. Specify size (circumference 6″ above and 6″ below knee) Small upper 15″-18″ lower 9 3/4″-12 3/4″; Medium upper 17 3/4″-20 3/4″ lower 12 1/2″-15 1/2″; Large upper 20 1/2″-23 1/2″ lower 15 1/4″-18 1/4″; X-Large upper 23 1/4″-26 1/4″ lower 18″-21″.