The Duro 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 two hydraulics 500ML soft flasks and ample room for food and gear, yet a slim and stable design, the Duro 15 was designed to push the limits of what marathoners and ultra-runners are capable of. Hip and harness pockets are ergonomically located to give you easy on-the-move access to your snacks, supplements and gear without sacrificing your pace. Made with 100% recycled materials. Two extra-large stretch mesh soft flask/food harness pockets Four lower stretch mesh food/ supplement harness pockets Vertical zippered harness slash pocket for valuables or phone Hydration sleeve with direct-zip access and hose path for easy loading 2 x 500ml soft flasks included Large front panel zippered compartment Stretch mesh front pocket for quickly stashing extra gear Snap-in adjustable/removable dual chest straps for customized stability Trekking pole/ice axe attachment Tuckaway safety whistle Two extra-large zippered lower hip pockets Two open stretch mesh hip pockets