MSA PremAire Cadet Escape Supplied Air Respirator with Medium Rubber Advantage 4000 Facepiece is ideal in construction, nuclear, oil & gas, sanding & grinding, spray painting and welding applications. It prevents the contaminants from entering the facepiece by retaining a slight positive pressure of air during inhaling or exhaling. Respirator is designed to be used with large, compressed air cylinder or a bank of cylinders set up in cascade fashion. It provides a first-stage regulator and cylinder valve within one assembly with its new streamlined design and can be operated with in an NIOSH-approved pressure range.