AER Go Pack vs Osprey Nebula Daypack - Men'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 really like the backpack, has all the features I need, but despite the 17" fit in the specs, my Lenovo Y740 does not fit in the sleeve. I can fit it outside of the sleeve, but that exposes the corners to drops, and defeats the purpose. Will have to return it and look for something bigger. Be aware!