[ EASY TO INSTALL & RELEASE ] : With 3 Adjustable velcro straps, this bag can easily be fixed on your bike. When installing correctly, it will be secure and won't swing even if your ride on a bumpy path. You can shorten the velcro straps by cutting the size according to your bike frame's size. The bag is compact, which can fit snugly on your bike frame and will not interfere with legs or leg motion while pedaling. [ ZIPPER OPENING ON BOTH SIDE ] : Vincita Bike frame bag has one zipper on each side offer more convenience in taking accessories while riding. The zippered opening mouth is big for easy access to the main compartment. [INTEGRATED PADDED SHOULDER STRAP FOR CARRYING BIKE]: This bag can doubles as a shoulder pad when you need to carry your bike. [ WIDE ZIPPER OPENING AND ELASTIC LOOP ] : So it's easy to see and grab your item inside—the perfect bag for phones, wallets, tubes, tire lever, CO2 cartridge, multi-tools, and other valuables. ENGINEERED TO ENDURE: The bag is made of durable, water-resistant fabric that can last through all your biking conditions. It is easy to clean and lightweight.