AER Go Pack vs Patagonia Nine Trails 26L Pack - Women's

These are going to be more suitable for ‘true’ one bagging (ie when you travel without a checked bag). If you decide to opt against a checked bag, perhaps look at a packable day bag and one of your options above, or take a look at the Peak Design Travel Bag, as this is designed with photographers in mind, is effectively a big bucket of a bag, and can expand from 35-45l (although I think when expanded to the full 45l it is slightly too big for most airlines). For a daily carry, you ideally want to be looking at something 25l or less, even under 20l.

- I got the S/M and have a 15in torso, but the pack was still too large for me. The back of the pack came above my shoulder and hit the back of my head.