Extremely rare now. A dust mask, perfect for COVID-19 countermeasures, distributed in 2020. Unlike commercially available non-woven fabric masks, it can be washed and reused, making it superior in terms of hygiene. It's a non-sale item and currently difficult to obtain, so a new, unused, and unopened item is very valuable. I have stored it with care. I will pack it carefully and ship it. #Abenomask #COVID-19Countermeasures #MinistryOfHealthLaborAndWelfare Thank you for viewing.