Insect and dust mite repellent sheets made of kraft paper, easy to cut and versatile. Thank you for viewing. I opened it once to check, but it is unused. Purchased in December 2025. [Size] 100cm x 380cm, Thickness 0.15mm [Quantity] 3 sheets [Made in] Japan [Material] Kraft paper *Please use under tatami mats, in closets, drawers, etc. [Active Ingredients] Borate, Boron compounds (Disodium octaborate tetrahydrate (DOT)), Non-volatile [Dust Mite Repellent Effect] Toxic (effects appear in 14-20 days) [Anti-Mold Effect] Sterilizing action (not effective against all types of mold) [Impregnation Amount] 5,000mg/㎡