I was hesitant about wearing a padded bra at first because I was afraid it would make my breasts too noticeable. However, it seems to be very hard to find a bra that hides well under a T-shirt that doesn't have at least light padding, so I finally tried one. It is the Leading Lady #5028 from Herroom.com. Once I determined the right size and put it on under a T-shirt I realized that, while it does give me a slightly rounder shape, it doesn't really increase my projection very much. As has already been mentioned, the light padding helps minimize or prevent nipple show-through, and it does protect my breasts when I bump them against something. I also found that wearing one of these when doing anything strenuous does seem to make me hot. I just recently bought a Bali One Smooth U Ultra Light Illusion Neckline bra (which is also a T-shirt bra) that has the newer type of padding that they call "spacer foam." So far it seems to allow a lot more air circulation, so it doesn't get as hot. Overall I have found that I like the look and feel of an underwire, lightly padded T-shirt bra better than anything else I have tried. I still wear a couple of different unlined stretch-cup bras, but my favorites are the ones that are lightly padded.