Rails Elsa Sweater in Blush. - size L (also in ) Rails Elsa Sweater in Blush. - size L (also in ) 55% acrylic 45% cotton. Hand wash cold. Knit fabric. RAIL-WK6. 8519 276 027. 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.