The Chilkat II Boot from North Face is a highly versatile, all purpose winter boot with HeatseekerTM insulation, warmth to 25F, and exceptional grip on frozen, treacherous surfaces. The Men's Chilkat II Boot has an antimicrobial footbed helps to beat the stink. For those off trail forays, a gaiter compatible D ring helps keep snow out of your boots. With IcePickR outsole, the rubber hardens when temperatures fall for better traction. Features: Upper: Waterproof, BLC compliant leather upper Waterproof construction 200 g HeatseekerTM insulation Anatomically engineered, injection molded, waterproof TPR shell with forefront grooves Rustproof hardwear Gaiter compatible D ring Bottom: Compression molded EVA midsole Durable TNF Winter GripR rubber outsole IcePickR temperature sensitive outsole lugs for increased traction Approx. Weight: 12 Pair: 1 lb 9 oz 709 g based on Men s 9 Technology: HeatseekerTM: The North FaceR proprietary synthetic insulation offers a great warmth to weight ratio, making it ideal for cold weather footwear that requires warmth with minimal bulk. IcePickR: Molded on the softer TNF Winter GripR outsole, IcePickR rubber hardens when temperatures fall below freezing to provide ultimate biting traction. TNF Winter GripR: A tacky rubber compound designed to remain soft when the temperature falls below freezing. H2O ProofTM: This waterproof construction method utilizes seam sealed, waterproof materials to provide an impermeable barrier to the elements.