Quote Originally Posted by zencentury View Post
I need a seat bag like that
It's Detours Bag. I bought it at REI. Jeff has a larger one. The clamps are the same, so they are interchangeable on our bikes.

I don't typically use such a large seat bag, but that picture was taken on a recent weeklong bike trip. I like having a slightly larger bag such as that for a bike trip, so I can carry a vest or armwarmers, and extra tube and more food than I'd normally carry (since we were way out in the boonies.)

I'm fairly impressed with the construction. The only drawback is that I don't think they will work well unless you have 4-6 inches or more of seatpost showing. You need the bag up high enough that it won't slump into your rear tire when going over bumps or when heavily loaded.

Susan