Enhanced dry storage: Features a robust hard shell design and a precisionengineered sealed zipper to prevent water penetration, ensuring stored items stay dry and secure even in bad weather. Convenient handling options: Comes with adjustable shoulder straps and hand rings, enabling handheld or singleshoulder carrying, making the bag suitable for various riding and commuting situations. Lowlight riding protection: Has embedded brightness reflective strips to improve visibility during nighttime or dimly lit rides, enhancing road safety for cyclists commuting in difficult lighting conditions. Practical and functional: The main section can hold water cups, tools, and apparel; the front interlayer offers a secure place for keys and cards; it has an 8.6L capacity with a threedimensional layout for efficient and reliable storage. Use scenarios Daily commuting in rain or shine: Keeps water cups, tools, and spare clothing dry and organized on the rear rack, with easy access to keys and cards in the front layer. Weekend rides or longer errands: Carries water cups, tools, and extra apparel; the front compartment secures keys and cards for convenient access at stops. City errands after rides: Keeps essential items in and secure while remaining easily accessible on the rear bike rack.