MARSHALLTOWN Carpet Layer's Kneepads are made of durable neoprene and have an extra padded strap above the knee for protection when using a knee kicker. The lower pads are reinforced with urethane for increased wear-resistance. The wide Velcro straps are ergonomically placed to fit the calf and thigh comfortably without pinching or sliding. The durable construction and removable foam inserts make these kneepads machine washable.