The 3M™ Speedglas™ Extended Coverage offers extended head coverage to help protect the wearer from welding spark and splatter. This coverage is a replacement part that is compatible with a wide variety of 3M™ Speedglas™ Welding Helmets.Welding is tough work and it's hard on you and your equipment. If the 3M Speedglas Extended Coverage on your compatible welding helmet becomes damaged or worn out from use, don't worry. Reach for this replacement part and stay in the action.