Design: Seam-sealed waterproof genuine suede and leather upper Lace-up style for a secure fit HEAT-MX(TM) 145 sustainable thermal insulation keeps your feet warm in wintery conditions Odor-eliminating, natural and non-toxic Cleansport NXT(TM) treatment In-Shoe Comfort: Removable CushyStep Everyday EVA foam footbed adds comfort and support Moisture wicking fleece lining for added warmth Durability & Traction: EVO non-marking synthetic rubber outsole Flexible multi-directional tread pattern provides better traction on snow and/or rocky surfaces Direct inject PU bottom for better comfort and durability Additional Details: Comfortable down to -22degF Height: 7.87 in Weight: 2.45 lbs per pair Circumference: 9.84 in (size 9) Leather is from a tannery rated Gold for its water, energy, and waste management practices