Ghnatygren Fantasy Mermaid Swim Tail Missing Mono Tail Size Insert 10-13 yrs old

Fabric tag states 95% cotton 5% polyester but it feels like 100% polyester. This Fantasy Swim Mermaid is missing it's mono tail insert (which adds body to the tail fin). Still could be plenty of fun. 10-13 yrs old. It has a hidden zipper on the side for ease putting on. See photos for elastic waist and length.