DescriptionAdding one our face mask filter in your face mask, the double protection will make you feel more secure when in outdoor or in other dusty or dirty position, as our mask filter can reduce the risk of breathing in gases, noxious smells, pollen, smoke, dust and other harmful particles effectively. It is easy to use, and it is suitable for both adults and children mask.Feature- Color: White. - Material: superfine fiber. - Size: 10x7x0.2cm. - Powerful filter system consists of material, effectively prevent pollutant like dust, small particle, PM2.5, fog from entering respiratory tract. - Can be easily inserted into mouth mask. - carbon filer, to protect your mouth and face from Dust, Haze, Germs, Allergies,Smoke,Pollution,Ash, Pollen,Gardening,Crafts. - The must-have essentials to fresh the air of your breathing, and it can lengthen the lifetime of your washable masks. - Proper replacement - The filter is suggested to replace every week for the best effect.