1. Sealing gasket at the interface between the dust mask body and the filter box: The genuine gasket has dense holes, so that the filter box squeezes the gasket when it is buckled on the dust mask body. This provides better sealing; while the fake gasket does not have small holes, and the elasticity of the gasket is relatively poor.

2. The exhalation valve piece of the main body of the genuine dust mask will appear blue when viewed against bright light; while the valve piece of the fake product will appear yellow through light.

3. The body of the genuine dust mask is opaque, while the fake one is transparent.

The answers are compiled by Shanghai Linghe Protection Technology-PPE Technology Department. If you have any questions, you can continue to ask!