Railroad socks 6090 mens white crew socks. Railroad socks work and sport white classic crew style socks with grey heel and toe - 6 pack. Material 85% cotton / 15% nylon. This Sock is a perfect mid-weight sock for just about anything. This quality cotton/nylon blend has a 1 x 1 rib top, and a full-cushioned sole for extra comfort and protection. Packaging includes 6 pairs. Made in USA.