"I've worn this as an outer layer in mild temps and as a base layer in extreme cold"
This Icebreaker thermal lives up to the company's high standard of practical and stylish gear for various uses. It keeps me warm in varying temperatures and doesn't smell even after wearing it for multiple days. The merino wool is a little itchy at first, but I wear a tank underneath and after a couple of hours the sleeves don't feel itchy at all. I highly recommend this product for those who don't mind paying a little extra for some quality gear.