3M™ Maintenance Free Half Mask 4251+ 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.
Get effective, easy-to-use and fully-assembled breathing protection with 3M™ Maintenance Free Half Mask 4251+. A newly enhanced valve assembly helps to reduce exhalation breathing resistance for improved breathing comfort. Our respirator has a textured face seal that’s soft, non-allergenic and silicone free, and provides FFA1P2 R D protection against a range of organic gases and vapours, and combination particulate hazards. The lightweight, well-balanced design features a centrally-positioned exhalation valve that helps reduce heat and moisture build up, helping you to stay comfortable in hot and humid conditions. The integrated cartridge and filters are maintenance free; simply use until your change-out schedule indicates a replacement is needed or when the filters are full, and then discard. An adjustable head cradle helps fit to a broad range of head shapes and sizes, and the neck straps are easy to fasten. The low-profile design won’t hinder your peripheral vision, and the two large, bonded-carbon filters provide low breathing resistance. FFA1P2 R D protects against organic vapours, with a boiling point greater than 65 °C, up to 10 x Occupational Exposure Limit (OEL) or 1000 ppm (whichever is lower), and 10 x OEL for particulates. Includes a resealable bag for hygienic storage and transportation. *Exhalation breathing resistance of 3M™ 4000+ reduced by >30% for 120 lpm peak exhalation flow and >35 % for 160 lpm compared to 3M™ 4000 Series. Results measured by 3M in 2017 under laboratory conditions. Breathing rates shown as an example only.