Amazing comfort and unsurpassed durability from the first step to the millionth! The KEEN Durand Mid WP hiking boots for men are crafted of KEEN PU and dual compound rubber outsole. They deliver durable, dependable longevity for the long haul. PU resists breakdown and compression, while preserving its shock-absorbing qualities no matter how many miles you put on them, keeping you comfortable while hiking. Feet stay dry thanks to the KEEN.Dry waterproof, breathable membrane. This hiker is American Built in KEEN's Portland, Oregon, factory. Fit Tip: This style is running a 1/2 small. We suggest ordering a 1/2 size larger than your usual size! HYBRID.OLOGIES: KEEN.DRY A proprietary waterproof, breathable membrane that lets vapor out without letting water in. METATOMICAL FOOTBED DESIGN This internal support mechanism is anatomically engineered to provide excellent arch support and cradle the natural contours of the foot.