xWarewolfxYeah no kidding. I go backpacking with upwards of $4k of camera equipment on my back, and the 20L dry sack on the inside of my pack is sealed up tighter than a snare drum. I can even chuck my pack into a raging river, pull it out, open the inner dry sack, and everything is bone dry. And for me, this sort of thing is the ultimate litmus test. If it isn't good enough to trust to that level, forget about it.