Full-Grain Polishable Leather & 1000 Denier Nylon Upper To reduce the weight of the boot, we combine our smooth, full-grain leather with incredibly strong 1000 Denier nylon. This durable upper is completely polishable. GORE-TEX (GTX)100% waterproof and breathable, GORE-TEX liners ensure that no water gets in, while allowing sweat and moisture to get out.Vibram® Kletter lift Outsole Specifically 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. This classic Kletter lift outsole is oil- and slip-resistant with low lugs for urban environments. It also features the Vibram TC4T compound for added durability.Stitch down Construction Handcrafted to provide a wider platform, our legendary stitchdown construction offers increased stability underfoot. Many of our stitch down boots can be recrafted. How It Fits The 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. Please note this last fits slightly long and we recommend sizing down a half size for best fit.Recraftable Extend 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. See our Recrafting page.