The material in these shirts is thin, but not see-through.  The best asset is that the sleeves are adequate length. So many shirts I order have sleeves that don't go all the way to my wrist.  These shirts have great sleeve lengths.  The material is wicking and does not wrinkle.  I now wear these daily under my scrubs at work.  The material is not constricting or inhibits movement, so I stay warm and look professional as I carry out my duties as a health care provider