Mermaid dress
From LatexWiki - the free latex fetish encyclopedia
A mermaid dress is a dress which is tight around the bottom and thighs, emphasising their shape, but which expands out around the lower legs, coming down to the ankles. The name comes from its resemblance to a mermaid's tail. In extreme instances, the dress may be so tight around the thighs that it acts rather like a hobble skirt.
Normally, such a dress would be made of satin. However, latex ones are available.