I am a middle aged female who was looking for something to wear under my scrubs and these are perfect.  Very important to pay attention to the reviewers who say they run small - be sure to order up.  Even with that, be aware that they fit close to the skin - choose something different if you are looking for a loose fit.  The fabric is not wimpy, but not thick like a T-shirt, either.

For my purposes, they are great because they feel very comfortable and look neat instead of baggy.  I like the short sleeves, which don't stick out of my scrubs sleeves (so I look a little less dorky).  I also like the mock turtleneck to help hide my (ugh) sagging neck skin.