Bought this for my girlfriend to use for cycling (although she is already using it for running as well). I was weary on sizing given PI's track record. She is 5' tall and about 115lbs, so I went with the Small and it fits her well. She has said it does a great job at blocking the cold air and holds up well in the rain.
The only reason for a four star, instead a five is the weight. I would prefer it to be a bit heavier material. Overall this is a well designed jacketed.
Light weight and love the fix!
