9-ounce soft fleece Air jet yarn for a soft, pill-resistant finish Coverseamed crewneck, arm seams and waistband Rib knit in collar, cuffs and waistband Set-in sleeves Here is a modern tribute to the mighty coal hauler that supplied the mills of Pittsburgh throughout the heyday of the American Steel empire. Trains still roll behind second hand locomotives like these ex Southern Pacific tunnel motors. Authentic railroad apparel!