Feature: 1. A hydration pack is an intelligent solution for carrying sufficient water on your journey without adding unnecessary weight. 2. This 5L hydration backpack, equipped with a 1.5L hydration reservoir 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 1.5-liter capacity hydration reservoir, 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 5L hydration backpack, equipped with a 1.5L hydration reservoir 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, polyester Color: Black/ Orange/ Blue/ Green (optional) Size: 20.5*4.5*41.5cm/ 8.1*1.8*16.3in Weight: 360g/ 12.7oz Package list: 1 * backpack Package List: 1 * backpack