FiberSource now offers Active-S Humidity Control Sheets, a maintenance-free alternative to desiccants, heaters, dehumidifiers, thermostats, hygrotherms, hygrostats, and corrosion inhibitors for preventing excess moisture in cabinets, enclosures, and cases. When humidity in the enclosure is high, the humidity control sheet absorbs the excess moisture, reducing humidity levels inside the cabinet. But when the cabinet becomes dry, the sheet “breathes out” the moisture, maintaining relative humidity at or under 60% in the cabinet.