34L, Special Forces-grade materials.
I never check my bags when I fly anymore, and try to fly with only a backpack when possible. I've always wanted to pack lighter and fit everything into one backpack. After a bit of research, it seemed like this Goruck was the one for the job. Extremely durable, tons of compartments and add-ons that can be strapped into the MOLLE webbing system.
I also have the padded GR2 field pocket add-on. I've taken this on countless short work trips and I lived out of it for a month while traveling through New Zealand. The GR2 is fairly no-frills, heavy and rugged.
