Source Outdoor Spinner Pro 3-Liter Race Hydration Cargo Pack Source Spinner PRO Race 3L Hydration Cargo Pack Liquid Capacity 100 oz. Built for the extreme long haul Cycling and Endurance and Adjustable bungee cord for external storage. Internal cargo pocket expandable to hold essentials with an additional detachable pocket Gravity G-Point positions the pack in the ideal place for maximum control and stability Includes Source Widepac 3L reservoir