OH MY GOSH UNDEROOS! I had wonder woman and batgirl ones, and c3p0 ones I think. Used to run around everywhere in my underoos!

I had Wonder Woman, R2D2 and Josie & The Pussycats. The Josie ones I really loved b/c the top looked like a BRA, not an under shirt. LOL!

I LOVED UNDEROOS!!! I remember having the Superman ones, and the Batman ones,,,,They came in a square cardboard sleve that looked kind of like a record.

These were around in the 70's, too. (Now I'm dating myself.) ;P I had Wonder Woman and Spider Girl.

I was a preteen and I was too big to wear them!

I was very little and was SOOOO disappointed when I learned that my Wonder Woman underoos couldn't be worn outside. So I never found use for the undershirt!

Batman. I may have had Captain America at some point, too, come to think of it. Possibly Superman, too. I remember noticing that a girl in 4th/5th grade had the Wonder Woman top on under her shirt, back in elementary school, since the collar on it was higher than her shirt. I didn't make a judgement, I just thought, "Wow, really?" because it took me by surprise. It felt like I'd noticed someone wearing a Halloween costume in March.