Features： 1、15L Cycle backpack, made of ultralight waterproof nylon fabric. 2、Special hole design for water bag (NOT included). 3、Adjustable shoulder strap, chest strap and waist strap to fit your need. With whistle design on the chest strap. 4、Ergonomic design on the back for maximum breathability and comfort. Reflective strips for safe riding at night. 5、Rain cover included and mesh cover to put your helmet. Suitable for outdoor activities like Cycle, rock-climbing and hiking, etc. Specification： This 15L bike backpack is specially designed for bicycle lovers and walkers. With ergonomic design, this backpack give you more comfortable feeling. And made of high-quality and safe material, it is durable for long-time use. It will surely contribute to your fantastic outdoor experience. Features: 15L Cycle backpack, made of ultralight waterresistant nylon fabric. Special hole design for water bag (NOT included). Adjustable shoulder strap, chest strap and waist strap to fit your need. With whistle design on the chest strap. Ergonomic design on the back for maximum breathability and comfort. Reflective strips for safe riding at night. Rain cover included and mesh cover to put your helmet. Suitable for outdoor activities like Cycle, rock-climbing and hiking, etc. Specifications: Color: Blue, Red, Green, Purple, Orange (optional) Material: Nylon Item size: 48 * 30 * 12cm / 18.9 * 11.8 * 4.7in Item weight: 540g / 1.19lb Notes: Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. Package List: 1 * Backpack 1 * Rain Cover Package List： 1 * Backpack 1 * Rain Cover