I really, really tried to like this but I had to return it.
This backpack is the right size for me (25L size) and anything bigger than that would have been too bulky or too heavy. First the item already felt heavy even when empty so when I started putting things in them - just a pair of socks, scarf, bandaids, hairbrush, tissues, 2 protein bars, small flashlight - it felt really heavy.
I also use a fanny pack with a water bottle holder, so the fanny pack holds most of what I need near at hand - another protein bar, tissues, money, credit card and ID, chapstick and water bottle.
This backpack does not have a water bottle holder - it does have 2 small side-zipped compartment but you can not put water bottle in them - it falls out!
And my biggest negative comment is that this backpack makes my back so hot and sweaty that my shirt is so wet when I take the pack off.