Originally Posted by chennai
The REI bag is much easier to remove (and attach.) It has simple plastic hooks at the top. They can be tightened with a screwdriver. The other attachment point is a horizontal plastic hook about three quarters of the way down the bag. (There is also a velcro loop at the top, but the only time I have used it is on single track.) A sharp tug at the top releases the bag from the rack.
That sounds exactly like my
Altura pannier, I can't find a picture of the fittings but they are "Rixen and Kaul Vario".
(
Rixen and Kaul's website seems to be focused on a "Klixfix" system which is different to the "Vario", but looks very user friendly.)