The BreathSafe Respirator/Gas Mask Replacement Filter Set includes (2) P-A-1 Filters and (2) 3M Brand 7093CN Filters. The P-A-1 filters are ideal for non-organic toxic gasses such as tear gas and pepper spray. The 7093CN filters protect against dangerous particles in the air such as water droplets containing viruses (Covid-19, Ebola, Influenza, etc.) or particulates like dust, debris, and even asbestos.