Leather upper features Dri-LEX lining, a steel shank and a dual density polyurethane outsole. Features Poron Permafresh shock absorbing cushioned insoles with anti-bacterial protection. Electrical hazard tested to withstand applications of 14,400 volts at 60hz for one minute without leakage. 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.