Feature 1、Made from tear-resistant nylon fabric for extremely light weight and durability. 2、Reflective strips improve visibility and safety at night. 3、The main packet can hold a water bag with a capacity of 2L or light clothing and other items. This large-capacity Cycle backpack is specially designed for Cycle enthusiasts and walkers. It weighs only 180g, making it a good choice for your fantastic outdoor experience. The 5L large capacity is spacious enough to store your needs. Nice bag for running, Cycle, hiking, fishing, etc. Features: Made from tear-resistant nylon fabric for extremely light weight and durability. Reflective strips improve visibility and safety at night. The main packet can hold a water bag with a capacity of 2L or light clothing and other items. The shoulder strap pocket can hold two 420ml soft water bottles. The zippered pocket on the shoulder strap can hold cards, change, etc. The external hanging device adopts an elastic rope design to stably fix the trekking pole. Specifications: Material: Nylon Color: Black/ Blue/ Grey/ Green/ Orange (optional) Capacity: 5L Size: 37*18cm/ 14.6*7.1in Weight: 180g/ 6.3oz Package List: 1 * 5L Hydration Backpack 1 * 1.5L Water Bladder 2 * 450ml Soft Water Bottles Package List 1 * 5L Hydration Backpack 1 * 1.5L Water Bladder 2 * 450ml Soft Water Bottles