Rails Pearl Top in Black,Grey. - size XS (also in L,M,S) Rails Pearl Top in Black,Grey. - size XS (also in L,M,S) 55% rayon 45% viscose. Hand wash cold. Partial front button closure. Button cuffs. Satin fabric. Imported. RAIL-WS755. 924-657A-2303. 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.