Black Backless Dress With Chain Detail Gem Backless Dresses Elegant Prom, Long Sleeve & Timeless Black Styles BACKLESS STYLES Khanum's Backless Gown Black Black Satin Scarf Detail Maxi Dress Dresses PrettyLittleThing CA. The Long Backless Scarf Dress is a flowy, statement making piece with a dramatic open back and scarf inspired ties. Lightweight and elegant, it moves beautifully with every stepperfect for summer evenings, beach parties, or vacation nights out.