Built specifically to meet the demands of the UTMB race, the Ultra™ 10 has been updated for 2019 to be lighter and better ventilated. The 2-liter reservoir delivers the hydration you need for self-supported runs that take you through a variety of terrain and unpredictable weather. With more than 10 liters of cargo, it’s engineered to hold everything on the UTMB packing list, including food, shed layers, a headlamp, trekking poles, maps and more. The harness and dual sternum straps adjust for a stable, comfortable fit, and the cargo compression lets you cinch everything down to minimize bulk. There's even a secure zippered pocket for a smart phone to document your trip and a trekking pole carry that can be utilized while running.