The ProFlex 230LTR Leather Knee Pads are built tough with genuine leather to provide excellent traction and knee protection from fire, slag and sparks. The leather is abrasion-resistant from the toughest work surfaces and wraps over the top of the knee pad for extra durability and a longer life for both your knees and the knee pads, even for jobs that require working on your knees daily. They are the most comfortable leather knee pads made with nitrile rubber (NBR) foam padding that keeps its shape over time and helps avoid common knee injuries. Built slightly wider than traditional knee pads, they deliver added coverage and comfort. The non-slip dual straps easily adjust to most knee\/leg sizes and the buckle closure keep the knee pad secured in place all day long without restricting circulation. An anti-odor treatment protects the inner fabric to keep your pads as fresh as the day you bought them.