Alpkit ones didn't used to have any support in them and would flop around a bunch, not sure if they've updated design
Same as the Deuter but it's small so not much of an issue. So Revelate vs. Topeak?
Topeak cheaper, bigger and has cable out but might be too big as it's 7.5cm all the way back.
@hippy started
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Alpkit ones didn't used to have any support in them and would flop around a bunch, not sure if they've updated design