Virus droplet protection mask using antibodies extracted from ostrich eggs. If the aluminum bag is unopened, it can be used safely for 5 years. The manufacturing date is February 17, 2023 (Reiwa 5). Use within 5 months after opening. - Quantity: 25 masks - Type: Pleated, memory type - Size: R size - Made in Japan URL https://crosseed.co.jp/SHOP/11030103.html Thank you for viewing.