Ortlieb Bikepacking Seat Pack QR - 13LSecurely Mount and Quickly Remove Do you have extra gear you need to carry with you on your bike? Get a large seat pack. The Ortlieb Bikepacking Seat Pack is a waterproof seat bag that offers sizeable storage space that can compress to a smaller size. The inside and bottom of the bag are stiffened, ensuring stability in bumpy terrain. It is made from a lightweight sturdy PU-laminated rip-stop nylon and features a roll closure, air release valve to easily purge the bag of trapped air, sturdy PE inner stiffener to increase the stability of the bag, and elastic cords on the outside. This bag has a quick-release system so you can quickly and securely mount the bag and speedily remove it. Features Spacious, waterproof saddlebag with a roll closure Material: lightweight sturdy PU-laminated rip-stop nylon Air release valve to easily purge the bag of trapped air, allowing for tighter compression Heavy-duty fabric used at the saddle rail mounting location Elastic cords on the outside of the bag for quick fixing of light gear Not compatible with carbon rails or carbon seat posts and electronic dropper posts Total volume: 13L | Ortlieb | Bikepacking Seat Pack Qr Seat Bag - 13L Black | Nylon