Rails Thea Button Up in Blue. - size XS (also in ) Rails Thea Button Up in Blue. - size XS (also in ) Rayon blend. Hand wash cold. Partial front button placket. Front tie detail. RAIL-WS606. 900 632 196. 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.