Tom Bihn bags are simply the best made bags you can buy. I have 5 and believe they may never need to be replaced.
The Synapse 25 backpack is a carefully calculated, supremely organized backpack, designed for day hiking, everyday carry, and ultralight travel. No mesh pockets clutter the exterior of this bag, nor extraneous straps festoon it; in it, you’ll be able to carry more than you would imagine, and no one will be the wiser.
I also have a short review of one of their bags long overdue.