Her er hvad de skriver om dem 🙂
Face Mask Details
It’s reusable: 5-layer activated replaceable carbon filter effective in blocking PM2.5 (Particulate Matter) haze, dust, and other fine particles. Recommended replacement of 1 to 2 times per week. One spare filter included per mask.
Super comfortable and washable: Adjustable ear straps and metal nose seal for custom fit. These masks are ECO Friendly, since they are washable/reusable. All you need to do is remove filter before washing.
This is NOT a certified mask, but it is the closest thing that we can supply.