So far have not used it for any athletic activities, yet. The jacket is almost too stylish to wear for those type of activities. It is thick, but still lightweight, I know doesn't seem to make a lot of sense, but if you get one you will understand. I can't wait to wear in the summer to see how it performs. True to size, I am a medium in most shirts jacket and medium fit well in this also. Already one of my favorite pieces I own. Get one you will not be disappointed.
Jon the mountain biker