Features: 1. Hydration Backpack: The cycling backpack with a water bag, the adjustable waist belt, chest belt, and fixes buckle design let the water bladder will not swing randomly during exercise. 2. Large Capacity 2L Hydration Bag: Safe and leak-proof, water bag made of EVA material and soft mouthpiece, fully leakproof, with a wide screw cap, you can add ice cubes to keep your drink colder. 3. Wear-resistant Material: Quality material, even on light rain days, don't worry about the items in the backpack getting wet and scratched. 4. Reflective Strips: Reflective strips can ensure safety in any light at night, keep you safe when you are cycling, walking, running, etc. 5. Suitable for Outdoor Sports: Fit for cycling riding, hiking, jogging, running, marathon. Backpacks meet men, women, or even kids in different body sizes, and also gifts for Christmas, Thanksgiving, Father's Day, Mother's Day, birthday gifts, and other holidays. Specification: Material: Polyester, EVA Size: 41 x 29 x 10cm Color: Blue, Black, Purple, Green, Rose Red Water Bag: 2L Weight: 500g Package Included: 1 x Polyester Backpack 1 x EVA Water Bag