This Hydration Bag Camelback Is Lightweight, weighing only 1 lb before water is added. The bag has adjustable straps for a comfortable fit for anyone, and carries up to 2 Liters of Water for even the longest raves or festivals. The bag has a separate Water-Free Compartment to store Accessories in, and a Waterproof Battery Pack that requires 2 AAA Batteries. Get down with style, stay hydrated and keep safe with this unique Hydration Bag. Pick your Light up Color and enjoy!