Osprey Duro Pro 10 is an ultralight, high-performance running vest developed in collaboration with elite runners, fine-tuned specifically for ultrarunning and long distances. The fit is stable and bounce-free, designed to sit comfortably on men through many hours at high speed. The vest comes with two soft Hydraulics™ 500 ml bottles for quick access to fluids without breaking stride.

Thoughtful pocket placement means you can reach everything you need – nutrition, clothing, gear – without removing the vest. It features a large main compartment with zip closure, an integrated tunnel pocket in the lower back for an extra layer or nutrition, and an upper pocket that keeps larger items securely in place. Four elastic open pockets at the front and sides provide quick access to small items, while the bottle pockets are designed for maximum stability. The upper zip pocket has an internal cinch cord that prevents larger items from moving around.

The removable Duro Dyna Pro Quiver is included and offers multiple flexible ways to carry poles – diagonally, vertically, or horizontally across the lower back using the dual carrying system. The vest also features an attachment loop for a GPS tracking device, which is frequently required in ultrarunning events, as well as a removable emergency whistle integrated into the front.

The Duro Pro 10 has reflective details for increased visibility in low-light conditions and is compatible with the Hydraulics LS 1.5 L reservoir. Two adjustable elastic cord closures allow quick on-the-go fine-tuning of the fit.