I am lookng for a 2-3lb climbing pack that can carry 40-45lb. It should be usable with a helmet on while on steep terrain. A frame is helpful but not necessary. I am willing to sacrifice some comforts and features as long as the pack is light.
At this point, I am trying to decide between Osprey Exos 58, GoLite Jam/Pinnacle and CiloGear Dyneema 45L
Any opinions about these packs or any other recommendations?