The 11” 4-Buckle has an anti-skid bar tread sole and heel. The outsole of these overshoes and boots have been lot tested to 14,000 volts to the electrical hazard requirements of ASTM F2413-05. Features & Benefits: ● ASTM F2413-05 EH Overshoes are made from yellow ozone resistant rubber that’s 100% waterproof. The construction is hand-layered in full-cut patterns to easily slip over work shoes. The lining is fabric so they easily slip on and off. This 11" 4-Buckle overshoe comes in whole sizes 7-17.