Description: 【Versatile Hydration and Phone Storage】: This lightweight sports backpack features a dedicated compartment for water bottle , with water pipe fixing belts, ensuring stay hydrated during your outdoor activities, and multiple storage pockets for carrying additional essentials like snacks, maps, or small gear items needed for your adventure, a front convenient zipper phone storage pocket , making it easy to access 【with Reflective Strips】: Hydration Pack Backpack is designed with reflective strips on both the front and back, this backpack enhances visibility during night runs or cycling, providing an extra layer of safe in low light conditions 【Secure Double Buckle Design】: The double buckle system ensures the Water Backpack for Running stays securely in place, offering stability and comfort whether you're running, hiking, or cycling. The backpack also features an elastic front cord for securing items like headbands, offering versatile functionality for outdoor adventures 【Comfortable and Breathable】: This lightweight Running Hydration Vest Bag equipped with a breathable mesh back system, this backpack ensures comfort during physical activities and keeping you cool 【Material】: Made from water resistant nylon material, this Water Bladder Backpack is designed to withstand light rain and splashes, keeping your belongings dry while you focus on your outdoor pursuits Specification: Material: Nylon     Size Chart: 20cmx4cmx40cm/7.87inchx1.57inchx15.75inch  Package Includes: 1 Hydration Vest Pack Backpack Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.