Polyester SO MUCH FUN: Sized just right for little ones, this Mermaid Tail Slumber Bag will be the center of attention at the next sleepover. Get inside! SLEEPING BAG: Used for naps, watching TV, sleeping over grandma's and having fun EASY CARE: Machine washable. Polyester fabric NAP MAT: Make nap time and bed time: FUN TIME! For ages 3-8 Measures: 58" x 29" (148 x 75 cm) N..