If you need or like to wear undershirts, this thread is not for you. After wearing undershirts for a long time, I realized that lots of people don't and decided to experiment. I discovered I liked the look and feel of no undershirt under my dress and sport shirts. I am careful not to wear shirts that are too thin, etc. It took a little getting used to, but I'd like to hear from others who've made a similar switch. How do you manage the small issues that may arise? Going with no undershirt has been a really enjoyable change for me.