Great baselayer. I used it once with the magic shell jacket and it kept me warm in upper 40s to 50s weather. With this combo, I think I can probably go down to 40s.
Great baselayer that is light for those days where you don't need a full thermal. I use this underneath a short sleeve jersey with a vest (45 deg) or underneath a light jacket(40 deg and below). Love the longer sleeves that prevent them from riding up and exposing my wrists.
Excellent product - dont hesitate purchasing.