Features: The hydration backpack pack has proper size, large capacity can store a variety of items, and easy for you to carry to other places, which will bring you convenience in using. If you have partners who need some hydration backpacks in the daily life, you can give them ours, they will like these gifts and feel happy. Specifications: Main material: nylon fabric and TPU Color: blue, black Size: backpack is approx. 14 inches x 7.4 inches x 4.5 inches Water storage bladder bag: about 50.7 oz/ 1.5 l Package includes: 2 x Hydration backpacks 2 x Water storage bladder bags Notes: Manual measurement, please allow slight errors on size. The color may exist slight difference due to different screen displays.