Boo! Shriek! Scream! Monsters have been a popular source of terror and unease in pop culture since the early days of story-telling! These monster pajama pants are sure to catch the attention of friends and family, as well as show off how much of a fan you are of these s! These pajama pants feature the monster known as The Invisible Man. The pants themselves are made of a soft 85% Cotton, 15% Polyester fabric blend, great for casual wear and lounging about!