Seam-sealed waterproof genuine suede upper (leather is from a tannery rated gold for its water, energy, and waste management practices), Waterproof gusset tongue Padded collar and side zipper closure HEAT-MX™ sustainable thermal insulation 8 mm Zylex® felt footbed for added protection and warmth Waterproof and flexible synthetic rubber shell SNOWTREAD synthetic rubber outsole, Deep, self-cleaning lugs for superior traction on snow Kamik Champlain 3 Mens