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. ATS® lightweight forked shank for enhanced support Waterproof PRO construction with an impermeable barrier U-Turn® Entry System allows easier entry for high arches Waterproof full-grain leather Removable Energy Max anti-fatigue insole for maximum comfort FLX Foam™ midsole for lightweight cushion and rebound Durable oil- and slip-resistant Duratread™ sole Debris-releasing tread design 90° heel