3M 4251+ Maintenance Free Gas/Vapour and Particulate Respirator 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. 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’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 FFA1P2 R D protects against organic vapours with a boiling point greater than 65 °C up to 10 x Workplace Exposure Limit (WEL) or 1000 ppm (whichever is lower) and 10 x WEL for particulates Includes a resealable bag for hygienic storage and transportation EN 405:2001+A1:2009