CORDURA® fabric and performance suede upper is abrasion- and tear-resistant. Metal hooks and D-rings for secure lacing. Bellows tongue keeps debris out. Breathable mesh lining. Merrell Air Cushion in the heel absorbs shock and adds stability. Merrell Kinetic Fit™ BASE removable contoured insole for flexible support. Compression molded EVA midsole for stability and comfort. Vibram® Megagrip® outsole.