Review: the Ristretto for 13
Josh Smith of writes:

“As you can see, I was able to fit quite a bit of tech in a very small bag. The Tom Bihn Ristretto is one of my favorite notebook bags because it allows me to carry something very small, without feeling like I have to make choices about what I carry. Normally when I pick up a bag that is this size I end up switching to a bigger bag within 2 weeks, but as long as I am taking my Air with me, it’s in the Ristretto.”