1.Only buy from RATIME store otherwise you will get fake item.Pack of 50pcs, perfect fit for whole family. 2.Suitable for people and the occasion:Cleaner, Builder, Doctor, Student. Great for painting, construction, nailsalons, medical, dental uses and people with allergies. Fit for Fog and hazeweather,Gray sky,Hospital,Fog weather, Dust weather, Snow weather, Buildingsite Etc. 3.Help protect one of your most vitalassets which is your respirat0ry system.