Product details:

The S-Lab Sense Ultra Hydration Vest is designed to make hydrating on your run a little easier, and not to mention, a little more well-balanced. To achieve such a feat, the Ultra 5 features Salomon's SensiFit design, which provides a contoured fit that's ideal for aerobic activities. The Ultra 5 is completely bladder-less, though it does come with two front soft flasks that are specifically built for hydration.