W4321406-12 / 21406-12 BOOTS SLIP ON HIGH VOLTAGE ASTM Dielectric Footwear Made from premium grade ozone resistant rubber, these dielectric boots are 100% waterproof. Their flexible hand-layered construction includes a durable nylon lining for easy donning and doffing. The sole features durable construction and a non-skid bar tread outsole. Attached buckle and hardware are non-metallic. Conforms with ASTM F1117 and is tested to ASTM F1116 at 20kV. Made in USA. Specify size when ordering.