What are the lightest expedition size packs available? I'm thinking something around 7000 ci, and can handle 100lbs or more.

The traditional packs are pretty heavy, has any lightweight gearmaker touched this segment? Kelty used to have the White Cloud and Phantom, which were decent sized (though not large enough) and in the 4 lbs range, but they are out of production.

The rest of the packs I see, Mystery Ranch, Arcteryx, Gregory, Osprey etc are all up around 7+ lbs.
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