BEST SELLING Real Mermaid Tails for all girls, boys and teens. HIGHEST QUALITY Swimmable Mermaid Tail and unbreakable Magic Fin Monofin. Mermaid tail and Monofin are designed for optimal safety, allowing Monofin to be removed quickly (in or out of water) with a tug and a kick. Suitable for Swimming and Costume. Machine Washable and fade-resistant fabric.