Run confidently with the CamelBak Ultra 17 oz Hydration Belt. This lightweight hydration belt is designed to hold the collapsible, 17-ounce Quick Stow™ flask, which features a 1-piece bite valve for quick hydration. Several pockets and a trekking-pole compartment means you'll have everything you need for your run, and the 3-D mesh material provides cooling, cross-directional airflow.