KneePro Tactical Ultra Flex III Safety Paintball Airsoft Knee Pad Various Colors 5/8" high density closed cell inner foam pad that does not absorb moisturee Non-marring grip strip. Hinged with metal rivets so it moves like your knee and stays in place No slipping, binding or cutting off your circulation Tough outer shell is chemical resistant and withstands extreme heat and cold Soft elastic woven strap coupled with Speed Clip allows for easy on and off use and adjustment while pad is on, will not bind behind knee