Lightweight shoe that delivers stellar performance on rugged planetary terrain. Innovative GORE-TEX membrane delivers 100% waterproof protection for a dry yet breathable foot environment. Upper is made from a blend of oiled nubuck, nubuck and textile materials for a lightweight yet durable fit. Textile lining. Direct-injected polyurethane midsole provides lightweight cushioning and durable support in conjunction with integrated Receptor Technology. Receptor Technology mirrors the foot's sensory nerve-ending cells and supports the natural movement of the foot, improving strength and stability, while minimizing fatigue and maximizing performance. An exceptional rubber outsole complements this rugged shoe by providing optimum traction and grip on tough surfaces. 4. 00 shaft height. 12. 00 circumference. 13. 00 oz. Product measurements were taken using size 37 (US Womens 6-6. 5). Please note that measurements may vary by size.