The Original Muck Boot Company™ delivers another rugged, comfy piece of footwear in the Arctic Sport Mid winter boot. A stretch-fit topline upper binding insulates the leg to contain heat, while 100 percent waterproof construction boosts protection. Double reinforcement areas on the instep, heel and achilles enhance comfort. A 2mm thermal foam underlay provides additional warmth. The MS-1 molded outsole maximizes traction on rugged terrain.