Designed for dedicated trail runners, the Osprey Duro 15L Men's Running Hydration Vest keeps hydration and essentials within reach on your longest adventures. The integrated 2.5-liter Hydraulics reservoir ensures you stay fueled from start to finish, while a thoughtfully stable design prevents bounce even when fully loaded. Multiple hip and harness pockets provide quick access to snacks, gear, or your phone—no need to slow down at any point on the course. Built with bluesign approved 100% recycled nylon stretch mesh, this vest is both environmentally conscious and highly durable. Whether tackling an ultra-marathon or training in rugged terrain, the Duro 15 delivers comfort and confidence mile after mile.