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, 1 hook and loop fastener commuter strap on the front + 1 longer hook and loop fastener commuter strap on the upper bottom( Please fixed the bag to the down tube with a long strap) + 1 hook and loop fastener buckle commuter strap on the lower bottom. It doesn't move around even if you ride on a bumpy or rocky road.

LARGE STORAGE ROOM: The size of our top tube bag is 9.4*3.9*3.1 inch.Wallet, mobile phone and other personal essentials can be easily simultaneously contained. It is perfect for smart phones such as iPhone XS/XS Max 8/8 Plus, Samsung Galaxy S9, and so on.