Built for hard work and long days on your feet, the Strongfield Leather 6in WP SR Work Boot features COMFORTBASE footbed technology for shock-absorption and cushion, while the ultra-durable TOUGHFRAME stabilizes and safeguards your feet all day long. FEATURES: Waterproof membrane seals out water and lets moisture escape. Waterproof full grain leather and mesh upper. Traditional lace closure. Bellows tongue keeps out debris. Breathable mesh lining. COMFORTBASE contoured insole cradles your foot in all day comfort. Nylon arch shank. Merrell Air Cushion in the heel absorbs shock and adds stability. TOUGHFRAME midsole technology acts as an exoskeleton for durable protection. Merrell sticky rubber outsole tunes each outsole with durable traction when and where you need it. Oil and slip resistant rubber outsole; Mark II tested. Heat resistant outsole protection for brief periods of contact that meet or exceed 500 F. EH rated ASTM F2413-18. Lug: 3.5mm.