Hydration Backpack Pack with 2L BPA Free Bladder - Lightweight Pack Keeps Liquid Cool Up to 4 Hours - Great Storage Compartments - Outdoor Sports Gear for Running Hiking Cycling Skiing 1.PERFECT SET - Included 70-Ounce (2 Liter) FDA APPROVED food grade hydration bladder 2.UPER LIGHT - Weight 0.8 lb with 2L bladder in high quality of the workmanship & Nylon material, it definitely won't burden you when sporting 3.GOOD VOLUME - Includes a storage compartments (16.5 * 9.85 inch) that will fit your clothes, keys, purses, phones etc. For even more storage, the front stretch mesh pockets allows you to pack even more on your hike 4.MULTIPLE USAGE BLADDER - It can bear the weight of 132 lb, you can use it as pillow if need to rest lying down outside, the opening is large enough to add ice cubes for chilling 5.EASY CLEANING- With updated large opening, you will never worried about cleaning or drying the bladder like others, and 100% leakage proof.