This bicycle top tube and front beam bag is an ideal choice for cycling enthusiasts. It is made of PVC material, boasting excellent waterproof performance. Whether it's light rain or splashes during cycling, it can provide reliable protection for the items inside the bag, eliminating your concerns about the items getting wet. Its large-capacity design is highly practical, with a capacity of 4L. It can easily hold various items needed during cycling, such as mobile phones, keys, energy bars, and small tools, making your cycling more convenient and freeing you from the hassle of carrying things. In terms of design, it features a hard-shell appearance with simple and smooth lines. It not only serves a functional purpose but also adds a unique aesthetic touch to the bicycle, making the overall combination more harmonious and beautiful. Moreover, this bicycle bag has no inner liner and a simple structure, facilitating daily cleaning and easy access to items. Whether you're cycling on city streets or穿梭于山地之间 (should be "shuttling through the mountains"), this bicycle top tube and front beam bag will be your considerate cycling companion, ensuring a smooth journey for every one of your cycling trips.