This model wasn't the only bladder hydration system that caught our eye. The Patagonia Fore Runner Vest 10L is ideal if you need to carry tons of stuff, but its large size is also heavier. See how the Nathon held up against all of the contenders in the complete, Best Hydration Pack review.
VaporAiress 2L, it has all the accessible features of the men's model with a fit designed to anatomically fit a woman's body better. With less material, the VaporAiress also weights less at 13.2 oz. Women's packs tend to fit women better, and we're stoked Nathan created a version of this great pack with lady runners in mind.