The merrell mens moab fst gtx walking boot offers out of the box comfort and protection for your next adventure the athletic styling and lighter midsole means it doesnt look out of place day to day either a moulded nylon arch shank and air cushion in the heel ensures stability and shock absorption features gore tex waterproof membrane waterproof and breathable mesh and tpu upper with a mesh lining comfy durable and breathable bellows tongue keeps out debris merrell m select fit