Nickelodeon Girls' Bubble Guppies Top & Shorts Pajama Set 2-piece PJ set, includes t-shirt with decorative trim and matching short pants with elastic waistband Materials: 100% polyester jersey Machine wash Imported Inspired by the Nick preschool series where kids learn about science, math, literacy, and much more in this musical comedy set in a vibrant, aquarium inspired underwater classroom. Tune in on Nickelodeon and Nick Jr.