Features: Protect your gear with the hard shell bike top tube bag, featuring crush resistant construction and waterproof composite carbon PU fabric to conservancy sunglasses and essential in any weather. The compact 17x6x9cm design weighs just 120g, offering organized storage for cycling glasses and keys through its fully taped zippers and anti deformation frame. Designed for road cyclists, mountain bikers, and commuters needing quick access storage that integrates seamlessly with their bike's geometry. Perfect for rainy rides and long distance travel, this aerodynamic bag keeps valuables dry while maintaining easy to reach during intense cycling. Its narrow side mounting systems prevents leg contact, ensuring a wobble ride whether tackling rough trail or commutes. Specifications: Materials: Composite carbon PU waterproof fabric, full-pressed zippers Size: 17x6x9cm Weight: 120g Capacity: about 0.5L Package Includes: Bike hard shell bag × 1 note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!