Radio Tesla Vintage Tee Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Officially Licensed by The Unknown Cat Vintage Tesla Radio advertisement graphic on brightly colored, top quality tees from The Unknown Cat. Lightweight, Classic fit, Double-needle sleeve and bottom hem