yes - I remember those!! lol!
also remember wearing ribbed cotton shirts that had a zipper down the front - with a ring on the zipper...
We used to have to put a safety pin in the back - at a certain point - so that when the boys pulled on the ring it wouldn't reveal too much.
(NOT that there was anything to reveal at that point...)
"Two drifters off to see the world. There's such a lot of world to see. . ."