The fleece lined, high-performance Arctic Sport is 100% waterproof and features double reinforcement at instep, heel and Achilles, and a lightweight EVA molded midsole with contoured footbed for supreme comfort and cushioning. A 2mm thermal underlay adds extra insulation on the inside, while the rugged MS-1 molded outsole and wrap-up toe bumper provide optimal traction, durability and protection on the outside. The stretch-fit topline binding keeps snow out and warmth in, so you tackle any cold weather task with confidence.