Non-metallic composite safety cap protects toes against falling and heavy rolling objects ATS lightweight forked shank for enhanced support Waterproof PRO construction with an impermeable barrier FLX Foam midsole for lightweight cushion and rebound Durable, oil- and slip-resistant Duratread sole. With extended sizes and widths, roomier opening and deeper scallop to accommodate high insteps and wider calves, the Big Rig is built for every guy. Engineered for optimal all-day comfort and safety, this boot steps up to rigorous working conditions.