This is my favorite pack, I fall in a lot and it's never let water in. That being said I wouldn't sink it for a day and expect anything to still be dry. I still double bag my nice camera with another dry bag when I know I am going to be wading deep for piece of mind, so it's not like I 100% trust it, but so far so good. I paid under 50 for one in like new condition so don't be paying a hundred bucks for one! If I was going to pay over a hundred the Sage Brush pack is the best.