All listed sized below are in EE-width! If you are looking for a boot that is made for normal widths, please check out our La Sportiva Aequilibrium Trek boots. High Tech for High Alpine Extremes - Made in the USA Equally at home in the snow and the gorge, the light and agile Crag Rat Evo was built to endure. Waterproof GORE-TEX liners keep you dry while PerspairA(R) thread allows for maximum breathability. The PrimaLoftA(R) Aerogel Toe Cap provides superior insulation for the coldest conditions and a VibramA(R) Mulaz outsole allows for optimal traction. In addition to being impossibly durable, lightweight, insulated, grippy, breathable, waterproof and supportive, they&';re also crampon compatible. Everything a hero needs to do what they do best. Synthetic Leather and PerspairA(R) UpperThe synthetic leather upper has side panels made of PerspairA(R). PU-coated nylon thread is woven to create a material that is extremely lightweight and breathable while remaining incredibly durable.GORE-TEX (GTX)100% waterproof and breathable, GORE-TEX liners ensure that no water gets in, while allowing sweat and moisture to get out.PrimaLoftA(R) Aerogel Toe CapUsed by NASA to insulate space suits, Aerogel is the world&';s lightest solid comprised of more than 95% air. This toe cap provides superior insulation with minimal bulk or weight and doesn&';t pack down over time.Removable OrthoLite FootbedMultiple layers of varying density are combined for maximum cushioning and support. The entire footbed is made of open-cell polyurethane for better heat dissipation and air circulation.VibramA(R) Mulaz OutsoleThe Mulaz outsole is made of a sticky rubber compound that provides optimal traction on rock, snow or mud while providing support and durability in extreme environments.Crampon CompatibleThe semi-rigid heel clip is crampon-compatible and is built to handle extreme temperatures and icy conditions.TPU MudguardLIBAA(R) Smart TPU mudguard offers increased durability without adding weight.365-Day WarrantyIf you suspect your purchase isn&';t 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 and apparel lines.Designed for Extreme UseThis style was designed for extreme use and is made with PFAS Chemicals. Specifications Style 65820 Weight 42 oz per pair Closure Lace-Up Height 5.5" Insulation Non-Insulated Color Ice/Yellow Footbed OrthoLite Shank TPU Last Type JVC6-693H Lining Waterproof Liner GORE-TEX Outsole Vibram Mulaz Recraftable No Country of Origin United States Manufacturing Made in USA with Imported Components