Product Description Face mask with PM 2.5 filters made of soft cotton material, breathable, washable and reusable. With adjustable nose bridge and hook strap, fit a variety of face, easy and comfortable to wear. Haze mask fitted with a breathing valve that automatically opens and closes, allowing you to breathe smoothly. New Lab tested filtration technology filters over 95% of pollution, apply to PM 2.5, haze, dust, pollen, viruses, bacteriaand and other protection. Description: Features: 1.Cotton fabric, comfortable and soft 2.Breathable, washable and reusable 3.The length of widened and high elastic earband can be adjusted at will Specification: Material: cotton mask Mask size: about 9 x 5.5 inches How to Use: 1.Open face mask insert one activated carbon filters 2.Cover your nose and mouth with a mask 3.Adjust the buckle on both sides of the mask to the best position 4.Adjust the nose clip to fit your nose