The Airy Secure Series includes double metal strips that enhances the fit of the face mask. The mask expands following the top and bottom folds to form a 3D design, allowing for better breathability and communication. The product is made of melt-blown filter fabric with BFE (Bacterial Filtration Efficiency) ≥98% and PFE (Particle Filtration Efficiency) ≥96% which blocks out pollution, pollen and dust particles from the environment. Perfect for daily protection.