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For longer trail runs with lots of elevation, we kit up with the Osprey Duro Dyna Belt. The padded, low-friction mesh construction gives us a comfortable carry that also breathes and wicks, while the ErgoPull hip belt lets us make quick adjustments on the move. Whether we're hiking the steeps or upping the pace on straightaways, the included soft flasks compress as we sip, eliminating slosh and bulk for distraction-free strides.