"I packed all my clothes for my move in this bad boy."
When moving from Michigan to Aspen, I crammed as much as I could into my 35L sack and saved SO much room in my suitcase. You can completely sit on top of this thing and crank down with out any issues (I way 200+). I haven't ventured through a down pour with this thing exposed yet, but I'm not afraid to.
I have the 25L in this bag. I fit a full sleeping bag a 3 person tent and a change of clothes in this no problem. A dry sack with the ability to be compressed is priceless in backpacking. I am on the lookout to buy a few more smaller sizes of these. Great for canoeing!
This is a built to last, heavy duty dry compression sack. As good as, if not better than, the Sea to Summit equivalent. I would also check out OR Drycomp summit sacks, it makes for a great summit pack.