Thrash Protection – 100% Top Grain Leather. Superior fit and knuckle safety so your hands never get thrashed. Blow Out Prevention – Built tough. High Wear areas are reinforced and Critical Seams are all wrapped. Clam Free – Perforated Leather fingers and Corded Nylon Top to help prevent sweaty hands. Adjustable – Comfortable, secure Neoprene cuff enclosure and industrial grade Velcro means they wear just like you want them. Pucks – 100% Delrin with a dish shaped palm for Improved Ergonomics and safety