Racer back dress PrettyLittleThing Slim Thick Women's Light Blue Racerback Dress Walmart.com Racerback Rib Dress Free People Embroidered Rib Racer Dress Black Superdry BLACK RACERBACK DRESS 017 Shop. 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