For dependable longevity and amazing comfort, the Durand Mid Waterproof Hiking Boots are crafted with a PU midsole and a dual-compound rubber outsole. Built in Keen's Portland, Oregon factory, these durable boots keep feet dry with a waterproof, breathable membrane. TPU shank for torsional stability on uneven terrain Dual-compound rubber outsole for durable traction and grip Direct-attach PU (polyurethane) midsole for long-term, shock-absorbing cushioning (PU resists breakdown and compression for the long haul) Integrated PU heel cushion for shock-absorbing cushion and stability Keen.Dry waterproof, breathable membrane keeps water out and allows perspiration to escape Waterproof nubuck leather and mesh upper for support, durability, and breathability Removable metatomical dual-density EVA footbed cradles the natural contours of the foot and provides excellent arch support Built in Keen's Portland, Oregon factory Fit tip: Keen finds this style runs about a 12 size small; Keen suggests ordering a 12 size larger than your usual size