[blue free size]
Features:
Built-in fit checker for easier fit testing.
No need to carry a fit tester to quickly check your fit.
The lightest dustproof mask weighs approximately 2.8 oz (76 g).
[Features]
Built-in fit checker: Just pull the lever to test the fit.
Micron: Support RL classification and amazing electrostatic filter Micron Filter Mask
This product is for business use