These loose, backless, wide leg outfits emerged in the 1920s and 30s as resort wear, especially in places like the French Riviera and British coastal towns. They were stylish, modern, and, most importantly, YONGHS Women's 1920s Flapper Dress Sequin Tassels Halter Backless Latin Dance Costume with Arm Sleeves Gold One Size Walmart.com 1920s Backless Dress Shop on Pinterest 1920s Sequined Backless Halter Dress Retro Stage