Don't not use this! - Pelican 1500D Peli Desiccant Silica Gel

If you store a firearm in a foam lined case, or carry a firearm in one for any length of time at all... remember that foam attracts & often traps moisture. The natural enemy of firearm finishes. Using a dessicant is ESSENTIAL, however they are not all the same or equal in how well they work. I've used a lot of different options, but none have worked as consistently well as Pelican. It not only will keep your weapons safe from corrosion, it's 100% reusable. When it becomes saturated just pop it in the oven per the directions & it will work again like brand new. This desiccant silica gel pack from Pelican has no equal!