My favorite jerseys right now are from Sugoi; I have three Hans and two Wallaroo jerseys. They are all relaxed fit, and just loose enough to be comfortable without bunching under my Osprey pack. The Fino Tech fabric on the Hans is a wicking, quick-dry material, but it does not feel overly synthetic. The Wallaroos? I’ll admit that I was skeptical about merino wool until I tried it, now I just think they are awesome!