Named after the longest highway in the United States, the Wolverine I-90 EPX® 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. Dial in a precision fit with the BOA® Fit System, engineered to perform in any environment, even with gloves on. Make micro-adjustments for a precise fit and improved connection to the boot.”.