Comprising thermoplastic elastomer facepiece, 
soft sealing flange and forward angled nosepiece,
easy to adjust 3-pc sliding suspension. NIOSH Approved
SPERIAN T04 Cartridge against Ammonia and Methylamine.
SURVIVAIR T05 Organic Vapor and Acid Gas cartridges
SPERIAN S05 Organic Vapor and Acid Gas cartridges for 
protection against organic vapors, acid gases (chlorine, hydrogen
chloride, sulfur dioxide, chlorine dioxide, hydrogen 
fluoride and hydrogen sulfide) for escape in accordance with NIOSH
limitations.