The hose is insulated (for colder temperatures ... is the whole point of buying a hydration pack). The 3-liter hydration bladder was poorly made—its circular seal leaked. Holes on the top ...

We sorted the best running vests for packing your hydration and gear on daily runs, long trail adventures, and fast races ...

They're known primarily for their insulated hydration bladders, and have a following among Pacific Northwest backpackers. Finding Mazama Design's website, I couldn't believe the Rimrock's price.