Goruck backpacks. They remain unbelievably comfortable with heavy loads, last forever and the clamshell design makes them easy to pack and more importantly find your stuff. The only backpacks I will buy anymore.

I've been using the gr1 26L for work, grocery shopping and travelling for 5 years. https://www.goruck.com/collections/gr1

The gr2 and gr3 are excellent travel bags when you need something bigger. Only backpacks of that size that I have found comfortable to carry with just shoulder straps.