Prevents moisture and mold from entering, with paulownia wood slab for improved breathability. Paulownia granules enhance breathability. Paulownia wood is light and easy to use, with low moisture absorption properties, making it suitable for moisture-proof. Prevents condensation and mold from forming moisture and prevents condensation. ● Prevents discoloration and fading of your futon and clothing, so you can store it with confidence. It is more effective when placed not only on the bottom, but also on walls where futons are close. Size per sheet (approximate): Width 13.0 x Length 29.5 x Height 1.2 inches (33 x 75 x 3 cm); Material: Paulownia; Made in China.