I got the Switchback UL on sale, my first purchase…
Fabric: Nylon, stretch fabric
I got the Switchback UL on sale, my first purchase from REI.
This jacket is the lightest hardshell I've ever used! I would say the fit on this one is athletic, there's not much room for layering beyond a microfleece jacket or vest. The two way stretch, pit zippers are all pluses.
Breathability was fine; I live in the Southeast, where humidity's very high. The performance of my Gore Pac Light was no better than the UL. Get one of these, you won't be disappointed.