The Salomon S/Lab Ultra 12 Set Pack is purpose-built for ultra runs, carrying everything you need on the trail. SensiFIT technology allows the vest to stretch with your movement while promoting airflow to help keep you dry. These features help the vest stay comfortable mile after mile. With 12 litres of storage across strategically placed pockets, you can carry all your running essentials. Two 500ml soft flasks are included to keep you hydrated. These flasks store in bounce-free pockets, preventing unwanted motion from your hydration.