Elevated hydration performance. The updated Nathan QuickStart 2.0 6L with 1.5L Bladder was given an upgrade in both style and efficiency. Powerful simplicity works in this new design and you'll love the soft, stretchy, and moisture wicking fabric improvements that keeps it ultra-lightweight so you can go further for longer. Holding 1.5L bladder while having impressive storage capacity for layers and other essentials, this hands-free hydration vest is a must-have on your next run.