Honeykoko Girls 3pcs Swimmable Mermaid Tail Bikini Swimwear Swimsuit Three piece costume. The bottom-finned piece of the costume does not allow for locomotion.girls cute 3pcs Mermaid Tail costume,hollow out tail bottom, easy to stand and walk around Girls Stretchy Mermaid Tail Swimmable Monofin Capable Swimsuit Set Hollow out tail bottom, easy to stand and walk around Material: Polyamide, Elasthanne Perfect for tub, beach holiday, pool party, bathing and swimming,halter design bikini top, adjustable for a better fit