Nubuck Leather & 1000 Denier Nylon UpperFor abrasion- and scuff-resistance, we use full grain nubuck leather combined with lightweight, breathable Denier nylon. This combination offers some of the best protection in cold and wet environments.GORE-TEX (GTX)100% waterproof and breathable, GORE-TEX liners ensure that no water gets in, while allowing sweat and moisture to get out.Danner AirthoticThis molded polyurethane instep cups the heel and supports the arch of the foot. Its half-length shape includes perforations to help air flow within your boots.VibramÂ® Kletterlift OutsoleSpecifically designed for comfort and durability; the heel provides superb shock absorption and the rubber compound guarantees great traction and stability on both wet and dry surfaces.Stitchdown ConstructionHandcrafted to provide a wider platform, our legendary stitchdown construction offers increased stability underfoot. Many of our stitchdown boots can be recrafted.How It FitsThe 650 last offers a sleek, slender profile with a more narrow fit. Boots on this last tend to fit those with a more narrow foot better than those with a wider foot. This ensures a snug fit for terrain and activities that demand support and stability. If you do have a wider foot, we recommend ordering an "EE" (wide) in this style.RecraftableExtend the life of your boot with our recrafting services. This boot is eligible for a number of paid services, including part replacement, leather care and restitching.Â See our Recrafting page.365-Day WarrantyIf you suspect your purchase isnt up to our unrelenting standards, or is defective in any way, we want to make things right. We offer a 365-day warranty across our entire footwear line.