Got this jacket for 40*F - 50*F rides, I tend to ride hot so I wanted something that would keep me warm during chiller days but not so bulky that I have to wear it all the time. Its light weight, but has enough fluff to it to keep you warmer than just a wind breaker. I got a large and while its a snug fit it still works for me. May have gone with a XL but L still works.
