I guess if any company decided to branch out on a waterproof duffle bag it makes sense for it to be YETI. They’re the experts at preventing liquids from escaping, so I guess you just reverse it, and you’re good for calling it waterproof.
The Gear Junkie has the full review, including tossing it in a river, which I would suspect is a pretty good test to see if its indeed waterproof. It’s much like everything YETI makes though, expensive.
It’s $300 for the 50L version (sorry, $299.99), $350 for the 75L, and then $400 for the bug daddy 100L version. Again, there’s a reason YETI can charge what they do. They make a premium product that lasts.