Applicable models and capacity: Bicycle Tube Phone Bag for Trek Madone SSL 2015. Capacity 2 liters. Please verify compatibility with your model before . Easy phone use on the go: The transparent, sensitivity TPU touchscreen window lets you operate your phone inside the bag. A visor keeps the screen clearly visible in bright sunlight, and a headphone hole supports listening while riding. Multifunctional and secure storage: The bag offers two side pockets and a removable phone pocket, providing a 2in1 solution for phone storage and general items. The phone pocket attaches to the of the bag with Velcro for quick access. The bag is designed to fit snugly against the bike frame to avoid interference with pedaling. Large capacity and practical dimensions: Two side pockets measure 17.5 x 4 x 11.3 cm, offering ample space for bike tools, snacks, or other small items. Use scenarios: Long rides or navigationheavy trips: keep your phone accessible and usable via the TPU touchscreen window, while storing tools and snacks in the side pockets. Daily commutes: quick access to your phone through the pocket with secure storage for keys and small items in the side pockets. Training or group rides: listen to music or answer calls through the headphone hole without removing the phone. The design keeps items stable and out of the way, maintaining a comfortable pedaling experience.