[Spacious Storage]This 1L capacity bike saddle bag offers ample space for your cycling essentials, ensuring you're well-equipped for your rides. [Ergonomic Design]The angled design prevents scratching and allows for easy water bottle access, making it convenient to stay hydrated during your journey. [Enhanced Stability]Featuring a solid spine support and foam padding on both sides, this bag maintains its shape and stays firmly in place during rides. [Night Safety Features]Equipped with high-visibility reflective strips and a tail light hanging system, this bag ensures your safety during night rides. [Secure Attachment]The triple magic tape strap system and double zipper opening provide a stable, shake-proof fit while allowing easy access to your belongings. [Versatile Compatibility]Designed to fit various bike types including mountain, road, and folding bikes, utilizing the triangular space between the wheel and seat post. Specifications: Material: Polyester with PVC coating and foam padding Capacity: Approximately 1L Weight: Approximately 228g Recommended seat post length: At least 17cm exposed