After reading a lot of reviews, I decided to size down and boy am I glad I did. It fit perfectly. Im normally a size small and wanted a more fitted sweater so wind doesnt travel up the sleeves, Im sure it still will, but the fit is much more comfortable (not too loose, so its not like a home sweater). The jacket is still loose enough to wear long sleeves or a thin jacket underneath. Had it on for 5 minutes and its really warming me up! Great find, especially for the price (1/8th of other name brand jackets).