Package contents：KN95 Mask + Filter（Filters can be purchased separately） Color: as picture Please Note：Usually one filter can be used for 10 days,It is recommended to change at any time during flu and heavy pollution periods. Features: 1: Lightweight and comfortable, can also be carried alone. 2: Anti-dust, anti-static, anti-scratch use. 3: Fashionable appearance design. 4: No deformation after long-term use. 5: The exhaust valve is installed on both sides of the mask to automatically open and close, no air leakage, good filtering effect, no sultry and no fog. 6: The fabric feels delicate, soft and elastic, and has the characteristics of anti-fog, shockproof, and heat preservation. 7: 5 layers of KN95 melt blown cloth filter element, 5 layers of activated carbon filter element, the filtering effect reaches 99%. Installation Notes: 1: Put the mask on the bridge of the nose and chin. 2: Use Velcro to fix the back of the mask. 3: A malleable aluminum nose clip is installed on the bridge of the nose, which can be adjusted according to the different face and nose shape of each person, suitable for various face shapes, high density. 4: Check if it is suitable, cover your face with your hand and breathe hard to see if the air can flow. 5: Adjust the tightness of the mask up and down by adjusting the Velcro at the back. Velcro adjusts the size, suitable for most people to protect the face, soft material, comfortable to wear, good hand feeling, dustproof, and good warmth. Designed according to the human face shape, it covers the part below the bridge of the nose, and the bridge of the nose is fixed by aluminum , To prevent slipping. There are vents on the mouth, and the back neck is fixed by Velcro. Suitable for motorcycles, electric bicycle riders, Wargame, skiing, mountaineering and other outdoor and extreme sports enthusiasts.