Vintage 1950's Red Flannel underwear Christmas card

Neat vintage Christmas card is cute. Pair of long wooly red flannel underwear on the front, and says "Just itching". Open the card andand says "TO say it_ Merry Christmas Happy New Year" Measures 5 x 6. Made by Fun A Plenty. Including the original envelope, but it will have to be steamed open. Unused with no writing or rips.