FINALS Women's Funnies Mermaid Wing Back Swimsuit Women's Funnies Mermaid Wing Back Swimsuit Fabric: 80% Polyester / 20% Spandex Funnies Wing Back With a sleek and athletic design, the new Funnies wing back offers minimal coverage without sacrificing the support and comfort of the original butterfly back. The thin straps and elevated leg line make the wing back a stylish alternative for training.