Osprey Dyna 15 with 2.5L ReservoirThe women's Dyna 15, designed for your most committing trail running and race pursuits, is a formidable companion. As the miles pass by and support fades further and further into the background, you need a reliable vest pack that'll go the distance. With its 2. 5 liter reservoir and ample room for food and gear, yet a slim and stable design, the Dyna 15 was designed to push the limits of what marathoners and ultra runners are capable of. Hip and