Very comfortable and easy to pack, they roll up nice. I went to China for two weeks with a backpack and knew I needed to wash clothes in a sink and hang things to dry. I was disappointed by these thinking they were "quick dry" but they're really not. I took several shirts with me from REI that were labeled as "quick dry" and were really fast to dry compared to these.
They are very comfortable and they don't smell, so it was nice to have four pair in the package to change throughout the trip, I was just wishing they would dry faster. The material is just a little thicker/different than the workout Lulu Lemon or REI type shirts that would be dry overnight from hanging, these would still be pretty damp.