MSA Advantage 4000 Large Size Twin Port Facepiece is made of hycar material for added comfort. Facepiece includes bayonet adapters in lens, a net head harness and a fog reducing nosecup. It is used in agriculture, chemical construction, electric utility, mining, nuclear oil and gas, paper & pulp sanding & grinding welding applications. Facepiece is available in three standard sizes to ensure secure fit. It is compatible with air-purifying respirators, supplied-air respirators and powered air-purifying respirators.