I'm assisting my wife with finding riding gear that works for her. This has proven to be harder than I would have thought. Most of the woman's riding gear is over the top flashy and frilly. Not what my wife is looking for. She liked the look of these shirts and we ordered a Medium based on the sizing chart. That was TIGHT... and they arms were SHORT... She's 5'7" tall and 140 with a athletic/muscular build. We then ordered the large which fit well and the arms were long enough, until she sat on the bike. It was a no go, the back was too tight to get into a riding position and after 5 mins in the garage sitting on the bike she was done with the shirt because it was way too hot. The whole goal was to get something lighter and cooler than a jacket and this just missed the mark. The epaulets on the shoulders are also kinda lame looking along with the breast pockets being useless for anything other than chapstick.