The Deep Heel Lineman’s Storm Rubber has a diamond V-grip outsole and poleclimbing reinforcement patch. 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 Deep Heel Storm Rubber comes in Whole and Half Sizes 6-12, and Whole sizes 13-17.