I live in Montana where everything there is to do, is done outside. I use this while running trails, long hikes, rock climbing, and doing outdoor work. this is way better than a water bottle and it leaves water tasting good even after sitting in there for several days. It's easy to fill and pockets are great for energy bars, knives, lighters, and keys. only down side to this is it doesn't have back ventilation so when it's hot or your working hard it can build up rather fast, but it's definitely worth staying hydrated.
Pros: Durable, easy to run with, pockets for small gear, low profile.
Cons:...
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