What happened to the pack that it tore?

What about the Jam makes you think it will be a good replacement?

I haven't owned a Jam - two of my friends have, and no longer use it as neither one of them is UL and the Jam seems to be easy to overstuff. I have a ULA, which has a better frame/suspension and lets me occasionally overload it without suffering.
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"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzuki

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