This pack is like the diet that promises all the ice cream you wantlose weight with no compromises!except the Ki works. At slightly more than two pounds, it's as light as legit packs get, yet the padded hipbelt and rigid polyethylene frame, combined with excellent compression and stability, let you carry 30 pounds all day. The main compartment easily holds enough for a fair-weather week. 3,600 cu in, 2.3 lbs; www.granitegear.com
Bonus: Tough fabric makes the Ki durable for its weight.Bummer: Top access only and no lid make for an organizer's nightmare (add a lid for $22).