Great jacket, very true to size. Very warm or very light, very breathable. I wear this under my outerlayer almost all the time in New England. I can't say enough about this jacket. I also wear it around time in the fall, winter and spring and get a ton of compliments. Best part about this jacket is dog hair doesn't stick or get imbedded in it. I know you can get different levels of this jacket so I went from the first level to the best level and didn't see much different. This jacket has great windstopping capability and is very well made. I've had it for about two years and still looks brand new.