3M 4277+ Ffabe1P3 Rd Half Mask 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. Effectiv
