Moisture is the main enemy of any collection. With their low cost, silica gel and clay desiccants are the best choice for protection from moisture. Desiccants are an ideal humidity controller for coins, gun safes, cameras, tools, etc. Silica gel and clay desiccants prevent moisture related problems before they begin, creating a protective shield of dry air within any enclosed storage area. Silica gel and clay desiccants are easily reactivated and can provide a lifetime of protection.