Rails Devon Sweatpant in Grey. - size M (also in S) Rails Devon Sweatpant in Grey. - size M (also in S) 75.5% rayon 22.5% poly 2% spandex. Hand wash cold. Elastic drawstring waist. Side slant pockets. Brushed knit fabric. Imported. RAIL-WP15. 801-263-1848. 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.