Waterproof membrane seals out water and lets moisture escape Waterproof suede and ballistic mesh upper Traditional lace closure Bellows tongue keeps out debris Breathable mesh lining COMFORTBASE™ contoured insole cradles your foot in all day comfort Molded 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 that grips when and where you need it Lug: 5mm