Browning Dry Zone Desiccant
Instant protection from moisture/humidity. Sucks moisture from the air. Easy to recharge in an oven. Convenient and affordable. Absorbs moisture without electricity, and is rechargeable in an oven. It can be reactivated indefinitely. One 500-gram box protects up to 37 cubic feet of enclosed space, about the volume of a standard 30" wide safe.