Hard plastic outer shell is extremely strong and comes with a 1/2" thick foam inner pad that encloses the knee for comfort. Straps are soft and elastic woven, and are positioned well above and below the knee so they will not bind.
Clips snap easily into place for quick on and off. Comes with a non-marking grip strip that grips onto any surface. The two piece outer shell bends with your knee, remaining in place no matter how many times you get up and down. One size fits all.