From Kokubo
(At least once every 1-2 weeks, dry in the sun for about half a day.) Use it over and over again to make this product a great value. Suggested usage; 4-5 sheets per wardrobe.[Size] 12x26cm (1 sheet) x 2 [Net weight] 20g x 2 [Materials] B-Type silica gel, Polyester, Plypropylene.