Earloop elastic Please do not use and promptly replace the mask if the package and mask are damaged or stained 2. please read trhe instruction and directlion carefully before use, improper usage may cause the products performance to fail 3. its not recommeded to uyse the same mask for a loing time in non special attention mask is NOT intended for use in a medical or clinical setting, report adverse event to [email protected] The 3D design that fits the shape of the human face, the soft and flexible ear hooks, and the adjustable metal nose clip, bring you a more comfortable protection experience. 5-Layer Filter, Filter Efficiency≥95%: Breathable KN95 face masks are made of two layers of non-woven cloth, two layers of melt-blown fabric, one layer of hot air cotton. Inner skin-friendly layer, 5-ply KN95 mask help facilitate easy, simple, and healthy breathing at all times. This is a non-medical mask and is not approved for protection against COVID-19. This is a non-medical mask and is not approved for protection against COVID-19. please contact [email protected] for adverse event