Rails Imogen Sweater in Brown. - size XS (also in L, M, S) Rails Imogen Sweater in Brown. - size XS (also in L, M, S) 75% cashmere 25% silk. Dry clean only. Foldover neckline. Knit fabric. Imported. RAIL-WK70. 821-351A-2228. 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.