These nonwoven crepe bags are filled with drierite (anhydrous calcium sulfate) to completely dry the air within a package or container during shipment or storage. The bags are sturdy and held together by heat seals. Drierite bags also perform well in elevated temperatures and will not release absorbed moisture at less than 350°f. Desiccant bag will reduce the humidity to a 100°f dew point in 10 hours. These bags are dust-tight and will protect for many months. Materials packaged with these bags are protected from corrosion.