Re-designed and refreshed for 2022, the DH-caliber Ambush knee pads deliver confidence-inducing heavy-duty certified D3O® impact protection, foam padded sidewalls for additional knee coverage, and perforated neoprene panels for better temperature control. The open back design means they're easy to slip on and off trackside. Serious protection when you're feeling like pushing limits and sending it big. FEATURES Open-back design for easy install and removal. Featuring D3O® T5 Evo X certified impact absorbing foam. Perforated neoprene enhances venting and moisture control. Foam padded side walls offer additional coverage. Unisex Size range from XS-XXL. Fabric: 57% Polyurethane Based Non-Woven Cellular Polymer, 19% Nylon, 18% Neoprene, 6% Polyester.