CRAIN 199 BLACK POLY SKIN COMFORT KNEESThese black No. 199 Comfort Knees feature a polyurethane skin on the kneeling surface that resists tearing and penetration, providing greater durability. The polyurethane also works to prevent the build up of sharp objects such as splinters that can scratch floors. These popular knee pads are made for the flooring installer, providing the protection for both kneeling or knee kicking, and will not slip. The extra wide hook and loop straps won't pinch