3MR6900 / 6900 RESPIRATOR 6000 SERIES SZ LARGE Full Facepiece 6000 Series, Reusable This facepiece is lightweight and combines soft materials with adjustable straps to provide a secure and comfortable fit. Simply clean the respirator between uses. There are no extra parts required to attach filters, cartridges or a dual airline. The large, scratch-resistant lens offers excellent visibility. NIOSH approved for negative pressure air purifying and positive pressuredual airline applications.