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3M 4277+ Maintenance Free Organic/Inorganic Vapour, Acid Gases, and Combination Particulate Respirator 3M Maintenance Free Half Mask 4277+ 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. Effective and comfortable protection against organic vapour 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 is 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, FFABE1P3 R D provides protection against organic vapours with a boiling point greater than 65 C, inorganic vapours, and acid gases up to 10 xWorkplace Exposure Limit (WEL) or 1000 ppm (whichever is lower), and 20 xWEL for particulates, Includes a resealable bag for hygienic storage and transportation, EN 405:2001+A1:2009.