I got one of these two months ago, and haven't taken it off since. I wear it just about every day, whether alone or under something a bit heavier. It is quite possibly the softest top I own, which is saying something. It fits pretty well, just like a t shirt. That makes it much easier to fit under another layer, as opposed to comparable shirts. Another thing that is really impressive about this shirt is the warmth. As a lot of other people have noted, it keeps me very warm. However, it also doesn't overheat. I live in MS, and the temperature swings during the day are unbelievable. I can put this on in the morning when it's low 40s, and keep it on in the afternoon when it's 60, no sweat. Very helpful. Only caution would be that this is a lightweight layer. By no means should it be used as an outer layer for any cold to speak of. It works well in a chill, but nothing more. Also, it runs pretty snug, so don't buy down. I'm 5'9", 150, and wear a small that fits pretty close. This should definitely be in everyone's closet. Worth the price, no question.