Designed for multipurpose use. Acid gas/organic vapor/P100 cartridges help remove acid gasses such as chlorine or sulfur dioxide as well as organic vapors. Integral P100 filters are oil-proof and block 99.97% of particles 0.3 micron or larger. Respirator features a centrally located exhalation valve for improved hot air removal and clearer voice communication. Upper head strap features a cradle suspension for improved comfort and fit, while lower straps are two-piece adjustable for ease of donning and doffing. Each respirator comes with a hygiene cover to help keep the respirator interior clean when not in use and helps keep the shape of the respirator sealing surface. Meets NIOSH (National Institute for Occupational Safety and Health) requirements.