Synthetic leather and mesh upper. Bellows, closed-cell foam tongue keeps moisture and debris out. Kinetic Fit Advanced removable contoured insole with enhanced heel and arch structure and integrated cushion pod for medium support. Molded nylon arch shank. Merrell air cushion in the heel absorbs shock and adds stability. EVA midsole for stability and comfort. Vibram TC5+ sole. 5mm lug depth.