These bad boys are thick, double ply organic cotton. Zero bleach or dye. They have a pouch on the interior side for adding your own filter. This could be something fancy OR it can be a cut up coffee filter, swiller sheet, shop paper towel. They will give you full coverage from eyes to neck with tied straps that you can adjust for your own comfort.
BONUS: When you add a face mask to your cart to purchase, a special offer for the hand sanitizer will appear in your cart... go check it out.