First off, let me mention that unlike many of the customers at this site, my cold weather gear is used for long treks to the bus stop, long waits for the bus, and long bus rides with no heat. I have about 0 tolerance for the cold. I am a librarian and have a need to dress appropriately (not looking like a homeless guy with 30 bulging layers) for the library, this requires thin and warm clothes. This shirt is awesome for all of the above situations. It is very comfortable to wear by itself around the apartment, whether or not the heat is working - it doesn't get too warm if the heat picks up, and it keeps me sufficiently warm when the heat (generally) does not kick on. I still haven't gotten the whole "wearing pants" thing down yet, though, so if they make similar leggings, that would be great. Also, it works well for shoveling snow - I wear this, a t-shirt, and a light jacket. It keeps me from overheating and freezing. Also, it comes in black, which is necessary.