Made from high-strength, fabric-reinforced Type II rubber, Cementex Roll Blankets, aka ElectroShield. Designed, manufactured as sized sections with Velcro allow the 1000V rating protection to be wrapped and secured. Tested in the USA in strict accordance to current ASTM F2320 specifications. Roll blanket shielding is highly puncture- and tear-resistant, as well as flame- (self-extinguishing), oil-, and ozone-resistant. There are no retest requirements. Sections that have been worn or damaged should be discarded.