Soft and smooth yak leather and textile upper. Perforations in the upper for breathability. Cushioned collar offers cozy comfort. GORE-TEX® SURROUNDâ"¢ waterproof construction with increased breathability ensures an optimal climate for your feet and 100% protection from the elements. Lace-up closure for opimal fit. High density insole enhances moisture transportation. Direct-injected PU midsole foam and foot-fitted last provide long lasting cushioning and outstanding walking comfort. Durable and lightweight TPU outsole provides outstanding flexibility and all-day comfort.