Cow Kigurumi - Adult Halloween Costumes (One Size Fits All) Fleece Imported All of our kigurumi costumes are machine washable and can stand repeated cleanings without losing their shape. 100% Original from Sazac the creator of Kigurumi in Japan. Machine washable High quality fiber used in manufacture. Material: Fleece (100% polyester). Available in three sizes, they will fit kids from ages 2 - 9 & Adults Unisex.