I ordered a pair of these for a trip to Alaska. I absolutely loved them! They are warm, and have a soft, light fleece lining for added comfort. These thermals are perfect for that old-school, waffle-knit look, as well. The only issue is, with only a few washings, the seam began to unravel.These are nice, reasonable quality shirts for the money. While they're advertized as "thermal", the shirts are more of a lightweight variety, better suited for the changing seasons than sub-zero weather. Size-wise, the shirts seem to run a bit small, I'd suggest ordering one size up.Good quality, good fit, great item. Would purchase again and would recommend to a friend.Warm but not too warmYou know those chintzy halloween costumes? You unwrap it, or pull off the rack, and are amazed at how thin the material is?That's what this shirt reminded me of.One pull, over my head, and it was enough to know that this was not for me. It was like putting on a layer of gauze.Yeah no. Returned immediatelySupposed to be a 2X wasn’t even 1X very Light weightThis is kind of an old school style long sleeve undershirt that I like quite a bit. Some of the undershirts I've gotten lately have been very thin and very stretchy. Nothing wrong with that, but this style with its 60/40 cotton/poly fabric and the waffle knit is more substantial while still being very comfortable. It fits pretty snugly and that works well for layering with most any kind of shirt to wear over it. I particularly like the sleeve cuffs that will securely stay at the length I want. The collar is cut large enough to be comfortable. The fabric launders easily and the shirt looks good, in my opinion. Sizing seems correct to me. It's what I'd call a medium weight and that gives it a range of temperatures when it will be comfortable, layered or not. Overall I'm very happy to have this layering shirt.I have the disadvantage of testing this out during warm (A/C) weather, so it's hard to judge its overall warmth. It feels pretty cozy, however. And it's super soft--softer than most--and very comfortable. Compared to most that I've tried, it's softer, a bit more sheer, and slightly tighter at the cuffs. Makes a great base layer or PJ shirt.Très content