Made in Japan inner sheet replacement. Made of sturdy material. New, unused, unopened, 200 sheets (2 sets of 100 sheets) Unused individual sheets: 80+ Size: 70 x 160mm Keeps the inside of your mask clean. Provides double protection, enhancing infection prevention. Pre-cut and sealed from the start (100 sheets each). The 80 individual sheets have been opened, but are unused. Purchased for 1800 yen for 300 sheets. Please understand that these are stored at home, and please purchase only if you are satisfied.