3M™ 4251+ Maintenance-Free Reusable Half Mask

Breathing Comfort - New enhanced exhalation valve assembly reduces breathing resistance by over 30%*. Proven to consistently exceed CE standard requirements for breathing ease.
Wear Comfort - Soft and flexible face seal. Lightweight and well balanced mask. Low-profile and ergonomic design for optimal field of vision. Easily adjustable straps for secure, comfortable fit.
Convenient to use - Ready-to-use, maintenance free construction with integrated filters. Designed to suit many eyewear and hearing protection models from 3M. Resealable bag provides convenient and clean storage between uses.
Proven reliability - First choice of 3M reusable respirator across Europe since its introduction over 25 years ago. 4 versions available, each offering effective protection against differing hazards in the workplace.

* 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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