Rails Natalie Button Down in Red. - size XS (also in L,M,S) Rails Natalie Button Down in Red. - size XS (also in L,M,S) Rayon blend. Exposed front button closure with keyhole accents. Exposed button cuffs. RAIL-WS703. 209 696 966. 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.