I have one that I modified into a pannier. I used a pvc pipe under the main flap and used carabiners on each end and one from the bags center handle to click onto my rear rack. I also used Kiwi brand "Camp Dry" spray to water proof it. worked well for my needs until upgrading to Topeak bags. My only complaint is the main flap is only held closed by one clip so securing smaller items is a must. besides that, I really like the bag.