Comfy and lightweight - Gregory Maven 55 Backpack - Women's

As with all Gregory packs (and the Maven is no exception), I like the ease of adjustability. Not sure exactly how they do it, but the hip, lower and upper shoulder strap adjustments are very ergonomic and don't require unnecessary fiddling. And speaking of adjusting, the hip belt and the back panel (torso length) are both adjustable by Velcro to allow you to narrow in on what feels best over time and with different weights.