MOS Reference: Dielectric rubber insulating gloves for protection against electrical shock during live electrical work. Manufactured and tested in accordance with ASTM D120 standards with individual proof-testing and date-stamped certification. Natural rubber construction provides flexibility and dexterity while maintaining electrical insulation integrity. Must be worn with leather protector gloves (sold separately) to prevent mechanical damage to the rubber. Inspect before each use for cuts, punctures, and signs of aging. Re-test every six months per OSHA requirements.