The 3M 6000 Drop Down Series facepiece is the latest innovation in half facepiece design. The facepiece incorporates a unique drop down head harness system so that workers leaving the contaminated area can more easily communicate without totally removing the respirator. It is designed for workers who wear hard hats or hard hats with liftable face shields. With this system, the facepiece drops straight down onto the chest by detaching the neck strap.