Math Shirt - I Love Math - Math tee 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 Math Shirt - I Love Math - Math tee shirt math shirt kids, math nerd t-shirt, math t shirt, math tee shirts, math tshirts, math t shirt women, math funny shirts Lightweight, Classic fit, Double-needle sleeve and bottom hem