PM2.5 Filters that slide into the side of the large size mask for extra filtration disposable 5 pack throw away after 6 hours of use
LEGAL DISCLAIMER: Top Trenz PM2.5 filters are for FOR GENERAL PUBLIC USE ONLY and are NOT intended for medical or healthcare workers, and should not be confused with N95 respirators or other personal protective equipment (PPE). No warranties, either express or implied, are being made that these filters prevent infection or the transmission of viruses or diseases. These are not FDA APPROVED . All filters are not returnable.