Mini Dress Shell: 100% Polyester. Lining: 100% Polyester A knockout like the Rare Beauty Tulle Backless Mini Dress doesn't come around often! Stunning sheer tulle (atop a matching knit liner) sweeps across a pleated. plunging bodice and a high. banded waist. both supported by adjustable skinny straps that crisscross over a sultry open back. Midi skirt gets boost of sexiness that peek out beneath a sheer layer of tulle. Hidden back zipper/clasp.