Blackberry, Dark Heather, Graphite Heather, Heather Colors, Lilac, Midnight, Neon Colors, Safety Colors, Sunset, & Tweed are 50/50 cotton/polyester. Rib collar. Made with 100% U.S. cotton and the latest breakthrough in soft cotton technology, the Gildan® Heavy Cotton family has been remastered for improved printability, quality and comfort you can see and feel.