Features of the Merrell Men's Erie Mid Waterproof Shoe M Select DRY BARRIER impermeable membrane seals out water and lets moisture escape Waterproof suede and mesh Upper Metal D-Ring lacing system Bellows tongue keeps debris out Kinetic Fit BASE removable contoured insole for flexible support Merrell Air Cushion in the heel absorbs shock and adds stability EVA foam Midsole for stability and comfort M-Select GRIP Outsole tunes each Outsole with durable traction that grips when and where you need it 5mm lug depth