I May Be Nerdy But Only Periodically 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 Any nerd or geek would appreciate this shirt as a gift. Scientist or chemist alike would love this shirt. Lightweight, Classic fit, Double-needle sleeve and bottom hem