Zshellz.com Waterproof -DRY BAG! Grey or Black available.   New Size to the market. When inflated this bag floats! Great for camping, boating, Fishing, hunting (fits shot gun). Leave it in the truck bed or roof rack and everything inside will stay dry. These are amazing products that are new to the market. Any big-name brand would be $300+ for this same bag.  Like Patagonia-Filson-YETI 

Bag is airtight when zipper if fully closed. Floats