Xiongyi Kids Girls 3PCS Mermaid Set Top+Underpants+Tail Swimmable Fin Costume Swimwear Imported In China Package Included: 3Pcs(Top+Underpants+tail) Or 1 Mono Fin Our beautiful mermaid tails are swimmable and walkable It can fit for the mono fin like a mermaid in the water Mermaid tails are fun pool toys for experienced swimmers. The material is comfortable and a bit more elasticity