OTURE STYLISH DESIGN:Bike frame bag is made of EVA with 3D die-casting process.Surface material Carbon fiber PU can be highly abrasion proof and durable, excellent texture and stylish apperance.√ WATERPROOF: Surface material of this bike frame bag is PU material, and adhensive waterproof zipper. The bag inside would not be wet, keep your mobile phone, glasses and other personal items dry all the time.√ WITH DOUBLE ZIPPER: Double frosted slip resistant zipper puller design, open your bicycle bag easily, large opening is convenient for puting and picking things.√ EASY TO INSTALL: The bike top tube bag with 3 hook and loop fastener straps, It doesn't move around even if you ride on a bumpy or rocky road.√ Our business philosophy: quality and customers always be in the first place, continuous innovation, and constantly bring high quality new products to customers.