Disposable KN95 face mask, particulate respirator with headband straps. GB2626-2019 KN95 Standard Particulate filtering respirator for at least 95 percent filtration efficiency against certain non-oil based particles. Comfortable, light-weight weight respirator mask with headbands and adjustable nosepiece for secure fit and seal. Every package is labeled with a verifiable anti-counterfeit sticker. CAUTIONS AND LIMITATIONSPlease be advised failure to follow all instructions and limitations on the use of the KN95 protective masks can reduce its protection performance and may result in sickness or death. - This product cannot be applied to prevent against harmful gases. - Discard this face mask when it gets quite dirty or breathing resistance increase remarkably. - Store the mask in clean and cool place. Avoid high temperature over 40°C and humidity over 80% - Baby or patients with respiratory abnormalities cannot use it. - Do not use the face mask when oxygen concentration is less than 19.5%, because this product does not supply oxygen. Use only in adequately ventilated areas with sufficient oxygen. - Do not use the face mask when the concentration of dust, or particles are immediately dangerous to health or life. Leave the contaminated area immediately if breathing gets difficult or dizziness or distress occurs. - Do not wash the face mask with water. Water will destroy filtering ability and protection. - Check the air sealing of mask. Do not use if the face mask is broken or with hole or leakage.