Eat No Sleep Code Repeat Computer Science Nerd Geek T-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 Great gift for computer programmers, computer geeks and nerds, computer software engineers, coders, java programmers. Fun Novelty Gift Tee for birthdays, house warmings,family get togethers, Christmas, special occasions. Lightweight, Classic fit, Double-needle sleeve and bottom hem