This waterproof leather upper features DuroTech membrane barrier lining and a crepe EVA wedge outsole. Thinsulate insulation keeps feet warm while absorbing water in damp conditions. DRYZ technology, an innovative insole system that absorbs moisture and converts it into a dry gel within the insole of the shoe. As a result, the insole absorbs the moisture from perspiration throughout the day, yet remains dry to the touch. Electrical hazard tested to withstand applications of 14,400 volts at 60hz for one minute without leakage.