Reusable & Replaceable inner filter:Flexzorb: Elite Grade: HEPA-type activated carbon filter keeps out odors and sub-micron particles (down to 0.3 microns). 100% activated carbon layered with non-woven melt-blown fabric.
Effective filter period: Filter is effective for about one month or 69 hours of use, whichever is sooner. After please wash following instructions.
Vents: Two exhalation valves allow easier breathing and expel moisture while preventing outside air from entering.
Sizes: Universal Fit - suitable for the average human being.
Uses: Suitable for daily fashion use, protecting against viruses, commuting, sports, riding and light work. May cause fogging of glasses and goggles if the mask is not properly worn.
Likes: Valves make breathing much easier and less claustrophobic than non-valved face masks. The Material is not only flexible, but extremely comfortable for a face mask, the filter is strong and holds form, but remains soft to touch on the face.