Non-marring rubber cap won't damage or mark delicate work surfaces. • Non-marring long cap. • 840D nylon fabric cover. • 12 mm NBR foam padding cut to hug the knee. • Nickel-plated grommets. • Buckle closure. Non-marring rubber cap won't damage or mark delicate work surfaces. Elbow/Knee Pad Type: Knee; Size Group: One Size Fits Most; Closure Type: Buckle; Material(s): NBR Foam; Nylon.