Loose and lightweight and oh so comfortable. This is warm enough to wear around the house during the cold winters here in the Midwest, but when I go to bed my internal gauge goes crazy and I don’t want a heavy weight on me, this is perfect. The short sleeves do not fit tight on my larger upper arms. I ordered this in XL, my measurements are 36D, 31, 38, I love the fit, but as you can see from the measurements listed, I ordered up two sizes from what I could have fit in. And, when you look at how it fits me, I don't think I could have comfortably gone two sizes smaller. I stand just under 5’, so take that into consideration on the length. The quality and comfort are 5 star worthy. I take 1 star away just because of the large discrepency in the sizing.