The Wolverine I-90 EPX is perfect for long, cold days out on the job, with 400g Thinsulate Ultra insulation to keep your feet warm. Named after the longest highway in the United States, the Wolverine I-90 is made for long hours and many miles. The I-90 features a highly abrasion resistant TPU outsole which lasts 3x longer than other boots, and is resistant to splitting, chemicals and oils. SPECS & TECH Premium waterproof full-grain leather with reinforced heel counter Breathable waterproof membrane with moisture wicking mesh 400g Thinsulate Ultra provides extreme warmth in frigid temperatures Removable EPX Anti-Fatigue footbed molds to foot Advanced comfort PU midsole High-abrasion TPU lug outsole is 3x more abrasion resistant Direct-attach construction is extremely durable Nylon shank adds extra strength Backed by Wolverine's 30 day comfort guarantee