Very good shirt from Carhartt. Before someone buys it, they should know that it is comfortable but also stretchy. It is not just fitted, and of course it is not tight or anything like that. Also, the thickness of the shirt is moderate. It is not the thickest flannel shirt on the market. Given that Carhartt produces clothes oriented for use by professionals, I assume that the shirt is comfortable to wear with a shirt underneath. But in any case, it is very high quality, and quite warm even if worn only with a jacket on top in the middle of winter. Carhartt also has very nice designs. Overall, a very nice and high quality shirt.