I own an Osprey Aether (no longer made) at 1 pound, nine ounces and an Osprey Atmos 35 (discontinued) at 2 pounds, 4 ounces and love both. The Atmos 35 is really solid with a frame, mesh net at your back and really stretchy pockets all around. You can go for a week or more in this 35-liter pack. Just when I thought Osprey had completely abandoned the ultralight market with many packs at 4-5 pounds (not ultralight), I was pleased to discover the Hornet series at sub-two pounds. They have lots of choices for men and women. Worth a look at the company website.

Be light. Be safe. Be one with the pack.