MULTIFUNCTIONAL It can be used in various occupations and occasions, and can prevent harmful substances such as pollen, particulate matter, foreign saliva, car exhaust and so on. THE MOST SUITABLE SIZE we are happy to say that our items are suitable for adults and children and are ideal to stay in your home in an emergency. SAFETY MATERIAL The item is made of non-woven safety fabric with a melt-blown layer in the middle, which can effectively filter water droplets and particulate matter, but has good air permeability.