The backpack features a detachable front mesh bag with a fixed buckle, enabling quick installation and expansion of capacity for practical use. Key benefits and features Detachable front mesh bag: The front mesh bag can be removed from the backpack, allowing you to expand capacity when needed and attach it quickly for easy access. Fixed buckle design: The buckle is fixed, providing secure attachment and reliable performance during use. Drawstring access with bottom storage: The buckle area includes a drawstring for easy access and storage, and there is a zipper pocket at the bottom to store the mesh bag when not in use. Reflective safety strips: Reflective strips on the front enhance visibility in lowlight conditions, helping to alert others and improve safety. Comfortable shoulder straps: Thick, soft shoulder straps are designed to be comfortable and reduce shoulder strain, with reinforced connections for durability. Use scenarios Daily commuting and school use: Detach the front mesh bag to carry essential items separately or quickly add capacity when needed, keeping your main backpack more organized. Cycling or lowlight travel: The reflective front strips improve visibility to others in lowlight or nighttime conditions, increasing safety. Light outdoor activities and travel: Use the detachable mesh bag for quick access to frequently used items, then reattach for fullcapacity transport during activities such as short hikes or day trips.