Durable, flexible Yak nubuck leather upper. Uppers treated with HYDROMAXâ"¢ for enhanced water resistance. Supportive lace-up closure with pull-loops at top for a snug and adjustable fit. Padded collar and tongue provides excellent comfort and ankle support. Breathable textile linings. RECEPTOR® technology provides dynamic full foot support in every step. Direct-injected PU foam midsole for added comfort. Durable rubber outsole for excellent traction in the toughest terrain.