Effective and comfortable protection against organic vapour, inorganic vapours, acid gases, ammonia and hazardous particulates A newly enhanced valve assembly helps to reduce exhalation breathing resistance for improved breathing comfort Lightweight, well-balanced, low profile design Integrated cartridge and filters mean it's ready to use and maintenance free Soft, close-fitting face seal made with textured, non-allergenic material Adjustable head cradle and easy to fasten neck straps Centrally-positioned exhalation valve helps reduce heat and moisture build-up in hot and humid conditions FFABEK1P3 R D provides protection against organic vapours with a boiling point greater than 65 �C, inorganic and acid gases and ammonia up to 10 x Workplace Exposure Limit (WEL) or 1000 ppm (whichever is lower), and 20 x WEL for particulates Includes a resealable bag for hygienic storage and transportation 3M� Maintenance Free Half Mask 4279+ is a simple and ready-to-use respirator with an integrated cartridge and filters. A newly enhanced valve assembly helps to reduce exhalation breathing resistance, and the close-fitting, non-silicone, textured face seal is soft and non-allergenic. Includes a resealable bag for hygienic storage and transportation.