I am selling my VAUDE brand saddle bag. Its condition is impeccable. Its volume is 10.5 liters, and it attaches and detaches very easily under the saddle thanks to the Klickfix system. A valve on the side allows you to vacuum seal it when packing your belongings. An elastic cord on the top allows you to attach a rain jacket or other clothing or accessories that need to be easily accessible. I used it once, but it is no longer useful to me since I have a luggage rack...