Features of the Merrell Men's Ontario Mid Shoe Full grain leather Upper 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 Footbed for flexible support Compression molded EVA Midsole for stability and comfort Vibram Megagrip is a High Performance rubber compound featuring unparalleled grip on wet and dry surfaces Optimal balance of grippiness and durability 3mm Lug depth