Brand new, unopened. Individually wrapped for hygiene, with 80 masks in total. Stored in a box to prevent dirt and dust. Made in Japan Nano Air Mask, 3D type, regular size. Nano Air Mask provides good breathability and comfortable wear. 20 masks per box, 4 boxes total. Purchase date: July 2025. There are no smokers or pets in the family. Shipping: Contents only, without the box. - Brand: Nano Air - Quantity: 20 masks per box - Features: Improved breathability, comfortable breathing - Size: Approximately 10.5cm x 13.8cm - Filter: High-performance nanofiber filter