The Stormfront Roll Top 47L Boat Bag from Patagonia.
The ideal stash bag for a day on the water, they took the tried-and-true concept and turned it into something even more useful. The 100% waterproof welded construction, exterior PU and interior single-side TPU-coated nylon fabric and secure, zipperless access ensure your extra fleece, electronics - and perhaps most importantly - the sandwiches, won't sog out. The adjustable shoulder strap and grab handles make it easy to haul while the external zippered pocket, internal mesh pocket and rod tube holders keep you organized. An ideal carry-on for the traveling angler.