Rails Shelby Dress in Black. - size M (also in XL, XS) Rails Shelby Dress in Black. - size M (also in XL, XS) 59% viscose 38% nylon 3% elastane. Made in China. Dry clean only. Unlined. Pull-on styling. Ribbed knit fabric with side seam slit. RAIL-WD290. 831-345B-001. Launched in 2006, Rails is a unique brand of fashion fusing California comfort activewear with European styling. High quality fabrics, narrow cuts, and unique lines; this collection is influenced by international travel and metropolitan lifestyle. Shop the latest in fashion from Rails