The Kamik Champlain 3 Side Zip Brown men’s insulated boot is made of seam-sealed waterproof genuine suede upper with waterproof gusset tongue. The boot includes HEAT-MX™ technology to keep your feet ultra warm. It is made of waterproof and flexible synthetic rubber shell, padded collar and side zipper closure. It features 8 mm Zylex® felt footbed for added protection and warmth and SNOWTREAD synthetic rubber outsole. The self-cleaning lugs offer superior traction on snow. It is comfortable down to -40°F.