Thank you for viewing. Please read the profile section. This product shuts out viruses and bacteria just by spraying it on your mask before wearing it. It's a set of 5. Although unused, it has been stored at home for a long time. Please refrain from purchasing if you are sensitive to this. Stock is available. Please consider purchasing only if you understand that this is a used item. We will compress the item as much as possible and ship it in simple packaging. Thank you.