10Pcs/Pack 5-Layers Cycling Mask Filter Replacement Anti Dust PM2.5 Activated Carbon Filter for Bike Bicycle Face Mask S

Specifications NameFace Mask Filter BrandBIKIGHTMaterialActivated carbon filterWeightAbout 5gQuantity10pcs  Features 1  Anti spray anti haze anti saliva anti dust  2 5 layer filtration safety protection rest assured breathing 3 Filtering effect95   How to Use  1 Open the mask leak out the valve inside the filter turn the valve anticlockwise according to the open on the valve and separate the gas valve 2 Take down the two air valves and take out the original filter of the mask 3 Replace with a new filter and turn the air valve clockwise according to the valve close instruction  Package included  10pcs x Face Mask Filter Note 1  It is recommended to replace the mask filter once every 30 days and once every 3 months if it is not frequently used Special period depends on the situation please replace the filter if it turns black or damaged 2 Please allow 1 3cm error due to manual measurement Please make sure you do not mind before you bid 3 Due to differences in light and screen the color of the item may be slightly different from the picture Thank you for your understanding