The PRO Gravel Seat Bag is an excellent choice for additional storage on your upcoming bikepacking adventure. This bag boasts a spacious single compartment with 15 liters of capacity, accommodating a wide array of items you might need on your trip. It also comes with a bungee cord for extra external storage. This bag is entirely waterproof and features anti-swing technology to ensure it remains stable and doesn't interfere with your ride. Reflective accents enhance rider visibility and safety. The bag securely attaches to the back of your seatpost, maintaining a low profile and avoiding wind resistance. With the PRO Gravel Seat Bag, cyclists can carry plenty of extra gear without compromising their ride.