Adult PM2.5 Reactivated Carbon Filter for Reusable Cotton Mask

Activated carbon. Inventory is available. High-quality materials: Made of activated carbon and non-woven melt-blown filter cloth, 5 layers filter system effectively keep away from PM2.5 and a range of airborne contaminants. Easy to use: just put it in the PM2.5 filter opening. 1. Filter insert can not be cleaned and should be replaced every week. 2. When film or sticky sediment stains emerge, please replace the filter. 4.5" W x 3" H