Recommendations for a waterproof roof rack cargo case?

[repins05]

I have a arb roof rack on my 4runner. I am looking for a WATERPROOF cargo case to put on it. Reading the fine print on a lot of the cases I am looking at.....most are not water proof (fully submerged). Yeti is one of the few that is waterproof but I am wanting something more like a ROAM in configuration and styling. My buddy has a Roam and water has entered the interior in heavy prolonged rain. Recommendations?