Perwanger leather uppers made from the very best leather available today. Perwanger uppers are ideal for durability and resistance against rocks, brush and harsh usage over time PU coated rubber rands on the toe box and heel enhance durability in harsh conditions while helping to prevent delamination The exclusive Zamberlan Vibram Starlite outsoles feature lightweight EVA midsoles and the ever-popular StarTrek tread, featuring specific lugs designed for high traction in a variety of backcountry applications Gore-Tex Performance Comfort membranes are guaranteed waterproof and breathable The ZBPK backpacking last is Zamberlan's most popular and well-regarded fit, allowing for excellent heel grip, comfortable over-the-top foot wrap, and a roomy toebox