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. BI FIT BOARDBy combining the shank, lasting board, and midsole into a single unified piece that is molded to match the shape and contours of our boots, we were able to reduce a significant amount of weight from the boot without sacrificing support.VIBRAM® KLETTERLIFT LIGHT OUTSOLEThis lighter weight version of the classic Kletterlift outsole is oil-and-slip-resistant with low lugs for urban environments. It also features the Vibram TC4T compound for added durability.STITCHDOWN CONSTRUCTION Handcrafted to provide a wider platform, our legendary stitchdown construction offers increased stability underfoot. Many of our stitchdown boots can be recrafted. HOW IT FITS The 610 is our most universal last and can be worn by all foot shapes and sizes. It provides a snug fit through the heel while allowing ample toe room for most versatile fit. This allows more support and side-to-side movement. RECRAFTABLE Extend the life of your boot with our recrafting services. Please note we are unable to replace the liner on this style due to the more technical construction of our lightweight Bi-Fit board. This boot is eligible for a boot stretch, basic and resole packages.