MSA Advantage 4000 single port facepiece with rubber head harness is made of silicone material for added comfort. Facepiece is ideal for asbestos abatement, welding, sanding And grinding applications. It includes a push-to-connect Adapter as well as a nosecup to reduce fogging and is available in three standard sizes to ensure snug fit. Facepiece is NIOSH approved and is compatible with air-purifying respirators, supplied-air respirators and powered air-purifying respirators.