IMPACTO Hinged Hard Shell Spark and Heat Resistant GEL KneepadsHard Shell: Removable Co-polymer cover hard shell cover, hinged action bends with your knee, ribbed surface helps prevent slipping, flat face for stability. Padding: Firm foam padding with Honeycomb gel centre to provides maximum knee protection. Breathable CoolMax® lining. Cover: Padding is covered with 100% cotton durable flame resistant fabric.Closure: Double elastic straps attached with hook and loop closure.