Lucky 13 Clothing - 1950's Style Black Cotton "First Class" Rockabilly Swing Dress. This flirty dress is made out of cotton poplin and boasts a lovely vintage silhouette. A belt adorned with a black velvet flower completes the classy finished look of yesteryear. Zips up the back. (Skirt is unlined) Juniors sizing. (meaning this dress runs on the small side)