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 technology for long lasting comfort. 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.