If you are using any hard or soft cases you absolutely need these bags.
Hard cases contain two sponges.
You are storing your gun between two sponges, any temperature or humidity change and you have condensation. These NoRust Bags will stop this with No Maintenance. Soft sided cases also have a wicking effect and cause condensation. Cases were not meant for long term storage, but by putting your weapon in a NoRust Bag you can then use your case. Why take up valuable space with storing your guns in one place and then storing your empty cases somewhere else.