I took this jersey with me on a bicycling trip in Iceland recently. It's a great mid-layer for cool temperature (40s-low 50s) riding, very versatke since it can be either a jersey or a jacket with the full zip, and it's good looking enough to wear in town off the bike. Fits nicely and ventilates well.
I now have two of these because of their versatility. It can be worn on or off the bike and doesn't scream bike wear so it's great for traveling. It kept me warm down to about 40 degrees. I can go either small or medium in this brand. I bought a medium so I'd have a little extra room to layer it and use as street wear.