These knee pads are made of 100% washable neoprene and have a super-soft contoured foam rubber pad insert for greater comfort. The front of this knee pad and strap is coated with polyurethane for increased durability and water resistance and will not mark or scratch floors. Quick and easy on/off using the single 3" wide front fastening Velcro strap. Nonbinding straps fit below the knee and prevent chafing, allowing these knee pads to be worn with shorts.