I wear this all the time! Biking and casually. It's a great layer. It's warm and the fleece lining feels soft against the skin. The hood works great under my helmet and the material is slick enough that it doesn't snag on a pack or get bunched up while riding. If the temps rise much above 50, it's a little too warm to wear for very long on the bike, but it is SO nice for cold starts! For a casual piece, it works great to knock that chill off and isn't bulky so it can be used as a layer under a warmer layer. It fits snug, which I like. For reference, I'm 5'6", weigh 135lbs and the small fits great on me. On top of all the great stuff listed above.....it looks awesome too!! Cognative keeps knocking it out of the park with their products.