Recently Upgraded To Version 50.0 Funny 50th 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 50th birthday gift idea Funny gift for any coder or gamer turning 50 years old Lightweight, Classic fit, Double-needle sleeve and bottom hem