UPPER: Nubuk leather. * MIDSOLE: PU Monowrap® Frame, a new, patented construction technique that allows us to reduce overall boot weight while retaining important lateral stability. * LINING: Seamless, waterproof GORE-TEX® lining reduces hot spots. A LOWA patented design. * OUTSOLE: Vibram® Renovo. * SHANK: Full length nylon.