Honestly, most of my trips it’s a quarter full and the water bladder and extra water bottles are what ozark trail chair makes it heavy. Even so, the roof openings have hoods over them, so there’s no easy way for water to leak through. It would probably only protect against light rainfall as ozark trail… Continue reading PREMIUM Backpack Duffle Bag, Carry-On Water Resistant PREMIUM general for sale by owner craigslist