Rails Lars Sweater in Blue. - size M (also in L, S, XL/1X) Rails Lars Sweater in Blue. - size M (also in L, S, XL/1X) 47% recycled nylon 32% wool 21% mohair. Hand wash. Pull-on styling. Midweight fuzzy knit fabric. RAIL-MK48. RM-835D-987E-8528. 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.