Training, racing, and more. The Duro 1.5 is a svelte hydration companion perfect for training runs, long races, or streamlined days in the mountains. While it may be the smallest volume vest-pack in this series, it will carry you further than you ever imagined. With a body-hugging fit that provides bounce-free carry, smart and accessible organization for fuel and gear, and an included Hydraulics® LT 1.5L reservoir that can be supplemented with soft flasks, the Duro 1.5 helps you focus on what matters most: continuous forward motion.

• Included Osprey Hydraulics® 1.5 LT reservoir with QuickConnect and sternum strap magnet for bite valve Front panel zippered internal reservoir sleeve Front panel zippered slash pocket Accessible dual lower side panel zippered stretch mesh pocket Lower stabilizing/expansion compression straps Snap-in adjustable/removable dual chest straps for customized stability Vertical zippered harness slash pocket for valuables or phone Dual extra-large stretch mesh soft flask/food harness pockets Dual lower stretch mesh food/supplement harness pockets Trekking pole attachment Tuckaway safety whistle S/M [34-40" / 86-102cm] M/L [39-45" / 99-114cm] - chest measurements