I’m in the market for a pack that will hold about 4000ci. I have one of the original Osprey Aether 60s which is a great pack, but would like to get the weight down even further. I tried a GoLite Trek but concluded that I want an internal frame. I don’t use a closed cell foam pad so can’t use that to provide stiffness.
Anyone have any suggestions or am I already down to about the lightest weight I can reach for this type of pack?

