KEEN Utility Men's Sparta II ESD ATThe perfect work shoe to stay comfortable, energized, and protected Breathable mesh upper with Synthetic stability overlays ESD helps reduce static electricity by conducting the charge from the body to the ground KEEN. ReGen compression resisting midsole offers 50% more energy return Oil and slip resistant, non marking rubber outsole Nylon shank Left and right asymmetrical aluminum toes weigh 35% less than steel and offer a sleeker appearance Meets