Enhanced Dry Storage robust hard shell design and precisionengineered sealed zipper to block water penetration, keeping stored belongings dry and secure even in adverse weather conditions. Versatile Carrying Options adjustable shoulder straps and hand rings for multiple carrying modes, such as handheld and single shoulder use, allowing the rear bike rack bag to be easily transported and accessed while meeting varied user preferences. Improved Road Visibility embedded brightness reflective strips reflect light efficiently at night or in dark environments, boosting rider visibility and promoting road safety for trips. Practical and Helpful this bag includes a main compartment for water cups, tools, and clothing to keep your cycling items organized while the front interlayer holds keys and cards, providing a wellthoughtout 8.6L threedimensional design for maximum utility and convenience. Use scenarios Daily commuting in wet weather: keep rain gear, tools, and clothing dry and organized, with quick access to keys and cards when you arrive. Weekend rides or bikepacking: 8.6L capacity supports clothing, water cups, and tools in a compact, well organized space on a rear bike rack. Night rides or lowlight conditions: reflective strips enhance visibility to drivers, supporting safer biking trips.