Design: Seam-sealed waterproof genuine suede and leather upper Faux shearling cuff Speed lacing system In-Shoe Comfort: Odor-eliminating, natural and non-toxic Cleansport NXT(TM) treatment Removable, molded EVA footbed for cushioning and comfort Moisture-wicking lining HEAT-MX(TM) sustainable thermal insulation for warmth Durability and Traction: Waterproof and flexible synthetic rubber shell Heel counter lug for easy removal and snowshoe strap retention ICEKISS dual-density synthetic rubber outsole Self-cleaning tread design keeps snow from accumulating in the outsole Additional Details: Height: 11.5 inches Weight: 2.48 lbs per pair Circumference (based on size 7): 14 ? inches -40degF comfort rating