Rails Dume Short in Blue. - size 30 (also in 25, 26, 27, 28, 29) Rails Dume Short in Blue. - size 30 (also in 25, 26, 27, 28, 29) 100% cotton. Machine wash cold. Zip fly with button closure and drawstring. 5-pocket styling. Midweight denim fabric. Shorts measure approx 15.5 in length. RAIL-WF55. 791-236C-8065. 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.