Recently Upgraded To Version 70.0 Funny 70th Birthday Shirt 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 Computer nerd humor 70th birthday gift idea Funny gift for any coder or gamer turning 70 years old Lightweight, Classic fit, Double-needle sleeve and bottom hem