Product description Keep the face mask clean before use. Do not touch the rear side of the face mask. Do not wash the face mask with water. Water will destroy the filtering ability and protective nature of the mask. Do not steam the face mask or put it in the microwave. Keep the face mask away from vapor, oils, chemicals, paints, liquid, acid, and alkaline objects. Make sure to discard the face mask when it becomes visibily ditry or breathing resistance increases remarkably. YOTU face mask is the ideal selection for your daily use, you can use it in school, office, public transportation, city streets, malls. Keep you far from dust, PM 2.5, haze, smoke, automobile exhaust, etc... About this item 3D Design：The 3D shape of KN95 cup dust mask is designed according to the human face shape to ensure the tightness, to fit the human face, to increase the breathing volume when use the face mask. breathable face mask KN95 can greatly improve the permeability, and to make wearing and exhaling more comfortable. 5-Ply Protective Layer：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 absorb the moisture from the breath, 5-ply KN95 mask is designed to offer more protection than a standard disposable 3-Ply mask. Can be perfectly placed in your backpack, purse and pocket. WIDELY USE：This kn95 protective masks are good for transport drivers,Commercial Buildings, Design & Construction, Food Processing, Food Safety, General Manufacturing, Heavy Infrastructure, Mining, Oil & Gas, Transportation, etc because they have daily contacts with large amount of people. › See more product details