Port Authority® - 100% Cotton Interlock Knit Mock Turtleneck. K321 A modern take on a great classic look. Super soft with a touch of spandex in collar/cuffs to retain shape. Fabric/Style: 6.3-ounce, 100% ring spun combed cotton; coverseamed, spandex in collar and cuffs, double-needle collar and bottom hem. Adult sizes: XS-6XL