(Not Sponsored - our opinion)
We were looking for a waterproof and lightweight backpack to store all our valuables e.g. gopro; camera; etc when we're travelling and exploring. Due to some recommendations via Instagram we purchased the North Storm 30L Backpack and have not been disappointed.
We keep our valuables permanently in it and just grab it whenever we are off to explore and want some photos or video.
It is totally waterproof - although we haven't swum with it. Its very lightweight. It still looks as good as the day we purchased it online directly from North Storm Waterproof Bags. It's a great product for us.