Superman / SuperGirl Fleece Kigurumi Pajama (One Size) Get comfy on the couch while you read your favorite issues of Action Comics and Superman when you wear the Superman Kigurumi Costume! This onesie pajama is one size fits most with hood, cape, and removable feet. Made from 100% polyester, the Superman Kigurumi Costume is super comfortable and great as both a costume and a pajama at home.