Features: 1. Material: Anti-sticking cloth, melt-blown nonwoven, SY-TB 2. Uses: anti-odor, anti-dust, anti-gas, anti-bacterial, anti-PM2.5. 3. Scope: dust masks, self-use masks, beauty salons, pet shop masks, factory masks, food processing masks, environmental cleaning masks and other protective dust can be placed. 4.The mask filter provide comfortable protection for people. It is suggested to replace the fliters every week of uses for the best effect. 5. Suit for kind of PM2.5 Face masks. Filter function: 1.The first layer: high efficient filter cloth filter the dust of micron. 2.The second layer: meltblown cloth to filter industrial pollutants, automobile exhaust, second-hand smoke pollen allergies. 3.The third layer: high efficient filter cloth filter benzene and a smaller function of filtering dust microns. 4.The fourth layer: activated carbon cloth filter density, smaller material. 5.The fifth layer: spunbond cloth, filter out all kinds of harmful substances. 6.The sixth layer: spunbond cloth Tips: 1. Plug-in filter can not be cleaned, it is recommended to replace it every 1-2 weeks; 2. The filter oil on the film or with sticky sediment stains are more, please replace the filter; 3. The air is not smooth, breathing difficult or sleep, wear is not recommended; 4. 2 weeks the following child lung capacity is low, is not recommended. Specifications: Type: adult, child Color: white Material: non-woven fabric， meltblown cloth, activated carbon cloth Layer: 6 (6 layers are combined into 4-5 layers, what can be seen in kind is 4-5 layers, actually 6 layers) Size: about 12x8cm (adult type), 10x7cm (child type) Application: hospitals, out, site, tourism, colds, operating workshops, farms, haze weather, cold and warm. Package included(optional): 1. 10/50/100pcs * filter papers (for adult) 2. 10/20/30pcs * filter papers (for child) Note: 1. Due to the different monitors and lighting, the picture may not reflect the actual color of the product. Thanks for your understanding. 2. Please allow 1-3cm measuring deviation due to manual measurement.