Breathable air mesh and synthetic upper. Lace up closure for a secure and comfortable fit. The Bellows tongue will provide debris protection. The Molded TPU external heel counter provides stability. M-Select FRESH prevents foot odor. The EVA removable footbed provides support and comfort. Merrell air cushion in the heel absorbs shock and adds stability. 3.5 mm Sole lug depth. Outsole is durable, shock absorbent, and provides great traction.