Durable full-grain Yak leather upper GORE-TEX waterproof construction to ensure dry, comfortable feet in wet weather FLUIDFORM™ Technologyand foot-fitted last provide anatomical support and an integral, durable bond between the upper and sole, without the compromises common with stitched and/or glued assemblies. ECCO SHOCKTHRU technology in the midsole for increased shock absorption Durable grip even on wet surfaces thanks to a long-lasting rubber outsole