Kininaru Nioitori (Worrying Odor Catcher) For condensation and mold対策 30cm x 4 pieces Catches condensation on windows with its absorbent function, and suppresses the growth of mold and bacteria. Prevents the formation of mold and unpleasant odors caused by condensation. [How to use] Simply place it under the window where condensation or humidity is a concern! Absorbency is restored by drying it in the sun. [Effective period] Approximately 6 months of effect per piece *It is recommended to dry it in the sun once a month. Will be shipped out of the box. Please understand.