Waterproof Design whale fall bike bag is made of waterproof material and with waterproof zipper, and comes with a rain cover, you can use it in heavy rain, completely rainproof! | Easy to Clearn whale fall bike phone bag is made of PU and EVA material, the bike frame bag adopts a special one-piece molding technology, which is very easy to clean. You can easily clean the whole pack in seconds with a damp cloth or tissue. | Easy to Install Comes with 3 Velcro fastenings long enough to provide more compatibility and stability to the bike's top tube. |