Half Mask, Series 4000+ / 3M

The 3M™ Maintenance-Free Reusable Half Mask, 4000+ Series incorporating a newly engineered valve assembly that helps reduce exhalation-breathing resistance by over 30 %.

-Maintenance-free construction
-Easy to fasten neck strap
-Ready to use
-Low profile design for better peripheral vision
-Lightweight, well balanced design
-Soft, non-allergenic material with textured face seal
-Central position of the exhalation valve for effective removal of heat
-Use until damaged, particulate filters clog or gas filters become saturated
-Very good compatibility with panoramic eyeshield 3M™ 2890 and 2890SA