The Tom Bihn Synapse 25 backpack: https://www.tombihn.com/collections/backpacks/products/synap...
I went nomad earlier this year and decided I needed a good backpack. After much research, I landed on the Synapse.
It's simply amazing that something as simple as "a bag" can be so well designed. So clearly better.
It's the only product I've ever owned where I notice myself stop and admire it regularly.