The Wolverine i-90 epx™ is perfect for long, cold days out on the job, with 400G thiosulfate 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 2X longer than other boots, and is resistant to splitting, chemicals and oils. In addition to its stronger than ever outsole, the i-90 has additional Wolverine technologies for long lasting safety and comfort. A nanotechnology carbon max safety toe keeps wearers light on their feet, while epx™ technology brings comfort closer to the foot with a dual-density footbed. Backed by our 30 day comfort guarantee, the i-90 is a must for long days on the job.