I would say that the 60% cotton 40% polyester Marvel V-Neck Juniors Sleep Set for the ladies is inspired mostly by science. Just think; Captain America was created via the Super Solider program, Iron Man is Tony Stark's favorite play-toy, the Incredible Hulk is what happens when you stand in front of the microwave while holding silverware, and...um...Thor is...um. Yeah. I think that's what I meant by the mostly science thing. Mostly. The Marvel V-Neck Juniors Sleep Set comes with both a v-neck top and a comfortable pair of sleep pants coated in images of the previously mentioned heroes. You'll deal with nightmares far better with the Marvel V-Neck Juniors Sleep Set!