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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.
Manufacturer: 3M
SKU: 3M4251
£16.44
  • Effective and comfortable protection against a range of vapour and particulate hazards
  • A newly enhanced valve assembly helps to reduce exhalation breathing resistance for improved breathing comfort
  • Lightweight, well-balanced 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
  • Available in a choice of four models
  • 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 4000+ Series. 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 they protect you against a range of gases, vapours and 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. Available in a choice of four models. 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.

  • Effective and comfortable protection against a range of vapour and particulate hazards
  • A newly enhanced valve assembly helps to reduce exhalation breathing resistance for improved breathing comfort
  • Lightweight, well-balanced 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
  • Available in a choice of four models
  • 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 4000+ Series. 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 they protect you against a range of gases, vapours and 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. Available in a choice of four models. 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.

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