Pit Filter, Made in Japan, Kaken PFE 0.1 Test Certificate, High-Performance Filter Sheet for Masks Country of Origin: Japan Material: Polypropylene Size: 5.1 x 23.6 inches (13 cm x 60 cm) Japanese Kaken PFE0.1 test certified to block 99% of the penetration of viruses, PM2.5, pollen, dust, etc. Washable, Reusable 62-24 .｡.୨୧⌒⌒⌒⌒⌒⌒⌒⌒⌒⌒⌒⌒⌒⌒⌒୨୧.｡. * Shipping is not available on weekends and holidays. * Because of simple packaging, the product may be removed from its packaging. * Due to long-term home storage, it is listed as "Like New". Thank you for your understanding. Thank you very much (⁎ᴗ͈ˬᴗ͈⁎)