Features: It adopts high-strength 500D waterproof fabric and meets EU environmental protection standards. Large capacity: 40L 66L 90L No need for rear frame, adapt to various models, quick release strap design. Highlight reflective leather to improve safety at night. Equipped with a shoulder strap 100% waterproof Material: Simple effective Roll Top Design for 100% waterproof. 1000D PVC,With seamless PVC material with high water repellency construction, waterproof performance is reliable, there is no need to worry about the contents getting wet. It can be used safely even on rainy days. Safe at night: reflective strips and tail light hangers increase night safety. With shoulder straps, you can use it even when offroad. One shoulder strap, two fast dismantling belts: Includes quick tallation of elastic bands to facilitate the opening of the zipper free curl design for better fixation. one shoulder strap, it's can be used as handbags, messenger bags, backpacks,and also can be used as motorcycles, bicycles, cars luggage bags according to your needs. The loading / unloading opening of the baggage opens widely, and it is easy to put in and out of things. 40L Large capacity: It is perfect for storage of repair equipment, everyday items, etc. It is a multifunctional and convenient rear bag.Easy to clean:simply wipe, tantly bright,fit for long journey