GIR's patent pending Filter 2.0 comes in refill packages of 10 filters each.
Whether you're wearing a cloth face cover or your best silicone face mask, you should always use your mask with a filter, and dispose of the filter after use.
This is a general-purpose filter, and provides general-purpose protection. GIR is not a medical device manufacturer. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.