70% BCI cotton 20% nylon 10% silk. Made in China. Dry clean only. Unlined. Pull-on styling. Rib knot fabric. Side slit. RAIL-WD266. 849B-360B-4769. 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.