From the manufacturer
The i-90 work boot features wolverine?s epx anti-fatigue technology that brings comfort closer to the foot. The epx technology conserves and returns energy to fight fatigue and features a footbed with a honeycomb heel that expands and absorbs impact, a cushioned midsole, and a rubber lug outsole. All components work together to provide unrivaled comfort and support step after step. A waterproof full-grain leather upper combined with a waterproof plus breathable membrane ensures feet stay dry all day long.