Best jac I've ever owned.
Breathes like nothing else. Keeps the wind almost fully of of you. Dries out in no time flat. Great for layering. Im 5"10 200 lbs with broad shoulders and athletic build and I wear a Medium. I like it to fit trim against my body. I jumped into a river with this on today and it was dry in 15 minutes. Have worn it for a year strait almost every day. I won't leave home without it.
Amazing for approaches.
**EDIT** Still going strong for two years now, everyday wear.**