Perfect for moderately cold weather.  We're in Florida, so this isn't being used a ton - but on the days where it drops below 40 my boyfriend will use this pretty much throughout the day.  He's a contractor, so he's outside most of the time at job sites.  I was recently in London where it was ~20-25F with the wind chill - this would've been perfect for that as well.

I bought a bunch of these & this was by far the best.  It conforms to the head really well (so the seams don't stick up or anything weird like that), it's quality material that stretches - but doesn't stretch to the point of being thin...it's exactly what you'd expect from Carthartt.