Homemade HEPA Filter Mask Instructions (Using HEPA Vacuum Bag)
Dec 11, 2020·If you do have an N95 mask and a beard, it’s time to shave! Moral obligation: ... you must use the HEPA vacuum bag as a filter inside a cloth mask. Materials. Fabric for the front of your mask, approximately 12×7 inches ... Pin the mask pattern to the back of your fabric or trace it using pencil.