package Contents: <b> <b> product features:<b> <b> 1. Five-layer PM2.5 carbon filter, made of activated carbon and non-woven fabric melt-blown filter cloth, effectively away from PM2.5 and a series of air pollutants.<b> 2. The size of the carbon filter is about 4.72 x 3.15 inches, which is compatible with most dust covers, and it is easy to insert or replace the original dust cover.<b> 3. Mask filter can prevent air dust, seasonal allergies, pollution, ashes, garden pollen, etc., suitable for most occasions.<b> <b> Usage steps:<b> <b> Step1:After washing your hands,take out the product.<b> Step2:place the PM2.5 carbon filter pad in the mouth cover to prevent slipping.<b><b> Step3:Install thePM2.5 carbon filter,fit your face and wear it correctly.<b> <b> Product parameters:<b> <b> Material: non-woven fabric, melt-blown fabric.<b> Dimensions: 4.72 inches x 3.15 inches.<b> <b> Precautions:<b> <b> (1) If there are stains on the film or sticky deposits, please replace the filter.<b> (2) The filter element cannot be cleaned and should be replaced daily to provide the best protection.<b> <b> Notes:<b> <b> (1) Please allow slight dimension difference due to different manual measurement.<b> (2) The color maybe a little difference compare the image with actual item due to monitor reflect.<b> (3) If any question, leave us a message, we will keep in touch with you.