For the car in case needed for the BOB (Bug Out Bag) or Get Home Bag (we have one backpack with emergency items and one with clothing/shoes if needed).  We travel thru California desert areas frequently - so sun/dust (think earthquake) could be a possibility.  Would not expect this to replace a N95 mask but has versatility. Picked a color based on price - but it's actually nice looking. Very soft, very reasonable quality at this price point, No smell.  Machine washed first in a similarly colored pillow case and hung to dry (dried fast). Weight stored inside a gallon ziplock is 6 ounces (5.8 in a quart bag - tight wrinkled fit).  Will order another for the other car instead of a bandana since either has a lot of possible uses in an emergency and we like this better than any of the bandanas we've picked up.