These 11'' Salisbury Class 00 Low Voltage gloves are made of black Type I natural rubber, a dielectric material that protects workers from electrical shock. This glove provides ideal arc flash protection for utility workers, electricians and industrial facility workers. Type I gloves are not ozone-resistant. Durable and extremely flexible these gloves make working with small parts easy. Voltage Class 00 electrical-insulating gloves are the lowest class and protect workers up to 500VAC. A leather protector should always be worn over a rubber insulating glove to provide protection from cuts, abrasions and punctures.