The longest highway in the United States, the new I-90 series is in it for the long haul. The boot has a TPU outsole that is 3x more abrasion resistant than traditional rubber, and Wolverine EPX technology brings cushion closer to the foot to fight fatigue all day long.Specifications and Features: Premium waterproof full-grain leather upper for premium look and feel Breathable waterproof membrane with moisture wicking mesh lining Removable Dual-Density PU EPX anti-fatigue Footbed Advanced Comfort PU Midsole TPU SR Lug outsole that is 3x more abrasion resistant Durable direct attach construction Nylon shank provides extra strength