The Osprey Duro 1.5 hydration vest offers a slim and streamlined carrying solution for trail runners and racers. Keeping you hydrated mile after mile, it includes two 500ml Hydraulics soft flasks alongside front bungee storage, multiple pockets, a trekking pole/axe attachment and tuckaway safety whistle. Snap-in adjustable/removable dual chest straps also offer customised stability for optimised comfort.