Features： 1、A hydration pack is an intelligent solution for carrying sufficient water on your journey without adding unnecessary weight. 2、This hydration backpack, equipped with a 2L hydration compartment and numerous pockets, ensures you stay organized on the go (water bag is not included). 3、Its zip-closure pockets allow for easy access to your essentials without disrupting your other gear. 4、The backpack\u0027s reflective design enhances your visibility in low-light conditions. 5、The padded mesh back panel and shoulder straps offer a comfortable fit. Specification： Designed for outdoor enthusiasts, this hydration backpack features a 2L capacity hydration compartment, making it versatile for a broad spectrum of users. 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: A hydration pack is an intelligent solution for carrying sufficient water on your journey without adding unnecessary weight.  This hydration backpack, equipped with a 2L hydration compartment and numerous pockets, ensures you stay organized on the go (water bag is not included). Its zip-closure pockets allow for easy access to your essentials without disrupting your other gear.  The backpack's reflective design enhances your visibility in low-light conditions. The padded mesh back panel and shoulder straps offer a comfortable fit. Specifications: Material: Nylon Color: Green/ Blue/ Black/ Grey (optional) Size: 40*22*5cm/ 15.7*8.7*2in Weight: 300g/ 10.6oz Package list: 1 * hydration backpack Package List： 1 * hydration backpack