1、PREMIUM MATERIALS: The bike tube bag is made of premium nylon and TPU materials, super lightweight and will not increase the burden of riding. Scratch resistant and durable. 2、WATERPROOF ZIPPER: Bike top tube bag comes with sealing waterproof zipper. It can perfectly guard your phone or items in rainy days and extreme conditions. 3、SUNSHADE DESIGN: The top of the bike cell phone holder bag is designed with a sunshade to help you view your phone screen clearly, perfect for sunny days. 4、EASY TO INSTALL: This bike front frame bag is designed with hook and loop straps for stable attachment to the frame. It will not move even if you ride on rough or rock surfaces. 5、MULTIPURPOSE: In addition to your cell phone, this bike pouch can also store many small items, such as keys, wallet, glasses, gloves, earphones, small repair tools, power bank, small flashlight and more.