Math Teacher Told You To Do First Time Tshirt 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 Amazing Designs Math Teacher Told You To Do First Time Tshirt Math Teacher Told You To Do First Time Tshirt Lightweight, Classic fit, Double-needle sleeve and bottom hem