***Make offer*** Bought in a COVID panic. Never used. The skinny box is some kind of HEPA filter refill. Probably a bit much for daily use but if you work with chemicals or fumes or dust...it's probably great. I think it might have been a Kickstarter product. **AT ANY GIVEN MOMENT, I MIGHT DROP THE PRICE TO $5!! THAT'S RIGHT, $5. IF YOU LIKE THIS ITEM, CLICK THE LITTLE HEART AND CHECK YOUR NOTIFICATIONS FREQUENTLY**