1、The hydration pack has ergonomics design on the back for maximum breathability and comfort, designed to last for years. 2、As a sports Cycle backpack, it fits various sports activities such as Cycle, mountain biking, running, mountaineering, jogging, climbing and hiking. 3、Two large independent compartments and two side pockets for your snacks, towels, phone, and other daily stuff, give you all the space you need to store various necessities. 4、The whole body is made of waterproof fabric to effectively protect the safety of the items in the bag in any environment. 5、The hydration backpack is printed with reflective signs to remind safety. This hydration backpack is designed for outdoor enthusiasts. Whether you're a casual visitor at amusement parks or an avid hiker or professional athlete, this pack is tailored to meet your hydration needs. Features: The hydration pack has ergonomics design on the back for maximum breathability and comfort, designed to last for years. As a sports Cycle backpack, it fits various sports activities such as Cycle, mountain biking, running, mountaineering, jogging, climbing and hiking. Two large independent compartments and two side pockets for your snacks, towels, phone, and other daily stuff, give you all the space you need to store various necessities. The whole body is made of waterproof fabric to effectively protect the safety of the items in the bag in any environment. The hydration backpack is printed with reflective signs to remind safety. Specifications: Material: Nylon Color: Red/ Dark Blue/ Green/ Black and Gray (optional) Size: 46*26*23cm/ 18.1*10.2*9.1in Weight: 520g/ 18.3oz Package list: 1 * backpack 1 * backpack