The SR 900 half mask is an Air Purifying Respirator (APR) made of thermoplastic elastomer (TPE) and polypropylene(PP) in three sizes, i.e. S, M and L. The mask is equipped with two exhalation valves, which ensures very lowexhalation resistance. The valve covers with partitions effectively protect the exhalation membrane against dustand paint mist. The material and pigment of the mask body are approved by FDA and BGA for foods, whichminimizes the risk of contact allergies.The easily adjustable elastic head harness straps of the mask are designed as a V-shaped loop and have a largedished crown plate, which contributes towards a comfortable and safe fit.The APR mask is used in combination with:• Filters and/or cartridges from the Sundström range.• Remote filter holder SR 905 according to 42 CFR part 84.• Powered Air-Purifying Respirator (PAPR) SR 500 and approved filters/cartridges included in the SundströmPAPR range according to 42 CFR part 84.A pre-filter holder for simple checking of the performance are supplied. Best stored in box SR 230 or storage case SR 339.