An ideal boot for the skilled backpacker and fast trekker. The Double Damper technology and the erGo-Last provide enhanced cushioning and a glove-like fit for long-term comfort on multiple-day hikes. 1.8 mm nubuck leather. The flex insert, tongue and collar are made of one piece of stretch fabric coupled with a stretchy Gore-Tex lining. Progressive lasting board to better match stiffness/flexibility to the length of the boot. Lenzi Putek Fabric: super abrasion-resistant threads. Gore-Tex Performance Comfort. Alveolen footbed (EVA, resin and felt) for lightweight comfort. Ballistic fabric and seamless PU Gore-Tex Extended Comfort Waterproof/Breathable construction. Ergo-Last wraps the foot better for a more comfortable ergonomic fit. Double Damper for enhanced cushioning and less fatigue. Heel Lock to fix the heel in the heel pocket and prevent heel slip and blisters. Internal layer of expanded PU for better cushioning. FrameFlex Mid nylon insole delivers the appropriate blend of stability and flexibility to haul heavy loads for a long distance in comfort. Bi-density PU midsole for comfort and stability. Spot wash. Imported.