ONLY racer neck ribbed midi dress in black ASOS Racer back dress PrettyLittleThing Black Structured Snatched Rib Racer Neck Dress Dresses Racerback Rib Dress Free People. The LNA Ribbed Skinny Racer Dress is made of the most comfortable ribbed cotton, and is the perfect length. Great for daytime paired with a denim jacket or with some boots and a leather jacket for a night look! Sleek and sporty, this LNA mini features soft, light grey fabric and a sporty racer back. Fabric: Mid weight ribbed knit Round neck Shell: 95% rayon 5% spandex Lined Wash cold Made in the USA of imported materials HEATHER GREY