Swimtastic&reg; Mermaid Tail - For Fun Or Fitness ~ Finally Bring Your Mermaid Fantasies to Life Iridescent fabric shimmers in the sunlight just like a real mermaid Swim in the tail for an exciting new fitness experience whether in the pool or at the beach "Mermaiding" in the tail with or without a monofin (sold separately) is great exercise for adults and tons of fun for kids - Designed to pair with Finis mermaid swim fin (sold separately) for those who desire increased swimming speeds Four sizes for children & adults; machine washable / line dry for easy care and lasting beauty Elastic waist fits even small girls and gives comfortable wear all day