I Ate Some Pie And It Was Delicious Funny Nerdy Math 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 In men's, women's, and youth sizes for your choice and comfort Multiple color variations Lightweight, Classic fit, Double-needle sleeve and bottom hem