Product Description These replacement mask filters offer five layers of filtering protection. Each filter is crafted with several layers of support that contain activated carbon, melt blown cloth, filter cloth, and non-woven fabrics. Filters can be used for up to seven continuous days. Designed to protect from allergens, dust, pollution, smoke, and exhaust. Activated carbon tablets filter benzene virus/bacteria. Micro filter tiny dust. Microfiltration filter: Automobile exhaust / second-hand smoke filtration. Microfiltration filter: Filter the fine material. Microfiltration filter: Filter the missing harmful substances at the end.
