This black bicycle tube phone bag is a practical essential for outdoor cycling! Weighing only 0.36KG, its lightweight design does not add to the burden of riding. With precise dimensions of 19x11x5cm, it fits phones up to 7inch (17.59cm) in size, fully meeting daily storage needs.The product is made of high-density PU leather + EVC+TPU+PE composite material, paired with a waterproof zippered closure for double waterproof protection. The hard shell structure offers excellent pressure resistance and impact resistance, ensuring the contents of the bag remain dry and safe in rainy or muddy conditions. The bag features a high-transparency TPU window for touch screen operation, offering sensitive and smooth touch response, allowing you to easily navigate and make calls without removing the bag. The light-blocking panel design ensures clear screen display under strong light without glare, balancing convenience and safety.The installation uses a three-point Velcro fastening system, which is secure and does not wobble, and it is easy to remove without damaging the bike frame. The pure black color scheme is understated and stable, perfectly matching various cycling equipment. Whether it's city commuting, mountain biking, or outdoor off-roading, it is an ideal cycling accessory that combines practicality, durability, and functionality.