The product is made of melt-blown filter fabric with BFE (bacterial filtration efficiency) >95% and PFE (particle filtration efficiency) >90%, which is used to block live bacteria (viable particles) from 1 to 5 microns and micro particles (nonviable particles) from 0.1 micron to 1 micron. Suitable for daily use. To use: 1. Cover your mouth, nose and chin with the colored side facing outwards
2. Pinch the metal edge of the mask so that it presses gently on your nose bridge.
3. Remove a used mask holding only the ear loops.
1. Please make sure that it is used within the validity period.
2. Do not use if the inner plastic packaging is damanged.
3. It is disposable and is recommended to change every 4 hours.