From The Wirecutter:

“Who it’s for: Do you destroy backpacks through calamity or carelessness? Do you want a tough, rain-resistant backpack that has a large main compartment that can be modified with aftermarket pouches as needed? Then you want one of these.

Why it’s great: GORUCK’s GR1 was designed by a former Army Green Beret to be adaptable and tough as nails in the field and has the lifetime warranty to back it. But don’t let its military pedigree fool you. The GR1’s subtle styling means it performs just as well in the city on the way to a cafe as it does in hostile territory. I owned a 26-liter GR1 for two years before it was stolen in British Columbia. I replaced it with the 21-liter version of the bag (I’m a short fella) a little over a year and a half ago. Since then, it’s been across Spain, was accidentally set on fire in Costa Rica, and has accompanied me to Mexico and up the side of an active volcano in Nicaragua. Where I go, it goes. It’s the best backpack I’ve ever owned.”

Read more here.