Feature: 1. The inner side is equipped with PE hard board, which makes the bag more stylish. 2. Multi-face bright reflective design reminds passing vehicle and pedestrians to make riding safer at night. 3. 15L large capacity, meeting the needs of daily travel storage, can store Cycle goods. 4. There is a mesh pocket on the side to store the kettle and small tools. 5. PVC material, waterproof bag, easy to wash, wear-resistant and anti-scratch. 6. Fine quality quick-release buckle is easy to install and disassemble. 7. It can be installed on a bicycle, can also be carried on shoulder. It can be used in various ways and can be changed at will. Specification: Large capacity bicycles back seats bag, spacious to hold carryings for medium and short distance Cycle. Features: The inner side is equipped with PE hard board, which makes the bag more stylish. Multi-face bright reflective design reminds passing vehicle and pedestrians to make riding safer at night. 15L large capacity, meeting the needs of daily travel storage, can store Cycle goods. There is a mesh pocket on the side to store the kettle and small tools. PVC material, waterproof bag, easy to wash, wear-resistant and anti-scratch. Fine quality quick-release buckle is easy to install and disassemble. It can be installed on a bicycle, can also be carried on shoulder. It can be used in various ways and can be changed at will. Specifications: Type: black, blue, yellow, orange (optional) Main material: PVC+PE Capacity before expansion: 12L Capacity after expansion: 15L Item size: 395 * 280 * 150mm / 15.5 * 11.0 * 5.9in Package size: 365 * 300 * 30mm / 14.4 * 11.8 * 1.2in Package weight: 646g / 1.4lb Packing List: 1 * Bicycle Rear Seats Bag Package List: 1 * Bicycle Rear Seats Bag