Funight Ventilation Series KN95 Face Masks follow the GB2626-2019 respiratory protection standards. These standards require all masks to have a filtration efficiency of at least 95%, which means the material can filter out harmful molecules such as fine particles and dust.Funight Ventilation Series KN95 Face Masks maintains a strict filtration efficiency standard while keeping the design comfortable and breathable. Each KN95 mask is composed of water column grade melt-blown fabric, which has been proven to be more efficient than cloth masks due to its electrostatic properties. Though this design, Funight Ventilation Series KN95 Mask has achieved breathing resistance that is 20% better than that of the GB2626-2019 standard.Funight Black Face Mask: Increasing the width of the ear loop to 5.5 mm reduces pain on ear and makes it more comfortable. And the ultrasonic welding technology we use make the surfaces of two objects form a fusion between the molecular layers, without any rough stitches and thread ends, and make the ear hook stronger.5-Ply Layers of Protective Filtration – Our KN95 mask are truly made of 5 layers with 2 non-woven outer layers as well as 2 melt-blown inner layers and a non-woven middle layer to absorb small moisture particles. Which is more protective than 3-ply disposable mask to help filter out 95% of particles.Disclaimer: This KN95 mask is NOT an N95 mask. For more information about KN95 masks please see the following before you purchase: amazon.com/AboutKN95s