Genius Periodic Element 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 Graphic tee design featuring periodic table elements spelling out the word genius. Designed for geeks, nerds, scientists, science majors, chemistry majors, cool people, pun lovers, atomic geniuses, and more. Awesome birthday or christmas present for the nerdy friend of yours! Lightweight, Classic fit, Double-needle sleeve and bottom hem