Saddleman Large Drifters are 17.5" x 10.5" x 6". I can put in one bag, two jackets without liners. With liners, one jacket per side. Perfect for my casual use. My rigid rear section has held up beautifully. I can also get in 12 bottles of beer per bag and do so about every two weeks.
I have mine rigid mounted to the bag supports in three places.
Saddleman Large Drifters 
