Features: 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