1. Low respiratory resistance, free of odor and stimulation.
2. No fiberglass, No rubber.
3 pounds (filtration efficiency for non - oily particles) of 95% or higher.
4. The BFE (bacterial filtration effeciency) 99% or higher
5. VFE viral filtration effectiiency)≥99%.
6.comfortable wearing experience.
7. Flat fold design offers convenient storage and portability.