Uppers made of Nubuck, pig suede leather and mesh. Merrell Omni-Fit™ lacingsystem for a secure and easy fit. Bellows tongue provides debris protection.M-Select FRESH provides odor control. Ortholite® anatomical footbed forincreased cushioning and support. Molded nylon arch shank for improvedstability. Merrell air cushion in the heel for improved shock absorbency.Merrell QForm® Comfort midsole for improved comfort. 4.5mm sole lug depth.Vibram® outsole is lightweight and durable.