User Review: Mountain Hardwear Men's Windstopper Tech Jacket

The guy who said this is no good under 45F is wacked. I've cross-country skied with it at -17F, over a wicking T and midweight long-sleeve shirt. Skied downhill in the 30s on a sunny day, but it's better to stick a lightweight gore shell on over it in those conditions, for waterproofing more than warmth.

Fine for winter hiking in the teens, too. Unless you're someone who's really cold all the time, or you're just going to be standing around outside, this is a great winter outer layer for clear days and just needs a single waterproof layer outside for wet ones.