Teenage Mutant Ninja Turtles started as a classic cartoon in the '80s and evolved into an all-time classic brand. Though turtles, our four heroes are known as ninjas who have saved the world again and again (in between pizza breaks, of course) with their best friend and reporter, April O'Neil! This pajama set-top features the four turtle heroes Leonardo, Donatello, Michelangelo, and Raphael, as seen in the classic animated series with the words 'Teenage Mutant Ninja Turtles' and 'Turtles '84' which is in reference to when cartoonists Kevin Eastman and Peter Laird published the first TMNT comic in 1984. The bottoms feature an all-over print of the turtle's faces. The set is made of a soft 100% polyester fabric blend-- for day-to-day wear and lounging about! These are the best!