- 3-layer filter is soft and comfortable
- External protection from dust and pollution
- Effective dust and pollution filters
- Practical, Hygienic, Economical
- Filtering efficiency of 95%
- Non-medical
- Box contains 48pcs
Product performance and structure:
- 1st layer - blue non-woven fabric
- 2nd layer - polypropylene meltblown fabric
- 3rd layer - white non-woven fabric
This product is sterilized by ethylene oxide.