[1 Bag2 Uses]: This bag has a super cool design! 4 Mounting holes on the top and bottom of the bag. with 2 removable velcro straps. this bag can be mounted on the bike top tube. or on the bike frame as a triangle bag. [3 Layers Shell]: The outside layer of this bike bag is 600D oxford cloth. the middle layer is 5mm EPE foam. the inner layer is polyester cloth. protect the contents of the bag and no longer worry about the sudden light rain (not recommended in heavy rain). [Better Zipper For Your Convenience]: The bag zipper is not only smooth. but with a long zipper pull. you can easily open and close this bike frame bag even while riding. saving your precious time! [LongerLarger]: 10.4*4.3*2.6in. this bike frame bag is big enough to store your wallet. mini pump. energy gel. inner tube. gloves. bike repairing tools. power bank and large screen phone. [Slim Design]: 2.6in slim body design makes this bike accessories pouch super cool! Effectively minimize the wind resistance. and will not rub on your knees. Ride freely without being restrained! [Easy to Install]: 1 fixed velcro strap and 2 removable velcro straps secures the bike top tube bag to the bike easily and securely. will not move around even if you ride on a bumpy road. Straps are extended and can be cut down to fit most of mountain. road and commuter bikes.