Not had experience, but it looks like it combines the worst features of a hip bag (limited capacity) with the worst features of a backpack (sweaty back).
I think the idea is that it doesn't give you a sweaty back as the part on your back is just mesh.
Im thinking it could be better than a normal hydration pack for this reason .
@Georgel started
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Not had experience, but it looks like it combines the worst features of a hip bag (limited capacity) with the worst features of a backpack (sweaty back).