Backpack main body drain suggestions.

Hey folks, been designing my next backpack and the last feature I can’t figure out is if or how drain slots should be incorperated into the main body of the pack.

My current pack doesnt have any and I find after rainy trips or when I rinse it, it holds water if I dont turn it inside out.

So far I’ve come up with water hose type slits between the hipbelt seam and body bottom. Might weaken a key seam or cause water to drain onto the back of legs though.

Wisdom please!