1. Hook and loop band design: quick release design and installation suitable for various bikes. Velcro fasteners attach your bag to the bike. Most importantly, whether you drive up or down yourself, fast driving, your bag will no longer shake. 2. Completely waterproof: this bicycle frame bag is durable with waterproof polyester, seamless waterproof zip together with hard frame, shakeproof and nondeformation, as well as protects your items in rainy days and extreme environments. The waterproof cover not only protects against rain. It also blocks dust. 3. Strong large capacity: enough interior space for long journeys, holds a lot of things, i.e. a small air pump, energy gel, phone, repair kit, keys, small wallet, sunglasses, rain cover. 4. Equipped with the shading board touch screen: sun visor on the top helps you to observe mobile phone screen clearly even in strong sunlight. The sensitive touch screen window allows you to comfortably operate functions on your phone and clearly see the screen through the transparent cover.