Design: Seal-sealed waterproof genuine leather upper for reliable protection in any weather Soft boa snow collar for added comfort D-ring lacing system for a secure fit Waterproof inside zipper and felt gusset tongue Heel pull loop for easy on and off In-Shoe Comfort: Moisture wicking fleece lining for comfortable all-day wear HEAT-MX™ sustainable thermal insulation keeps the feet warm Removable, molded EVA footbed for cushioning and comfort Durability & Traction: ASPEN rubber outsole uses deep lugs with GripXT, for superior traction in winter conditions Additional Details: Comfortable down to -4°F Leather is from a tannery rated gold for its water, energy, and waste management practices Odor-eliminating, natural and non-toxic Cleansport NXT™ treatment Includes an additional pair of laces