I'm A Math Teacher Of Course I Have Problems Funny 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 multiple color variations In men's and women's styles for your choice and comfort Lightweight, Classic fit, Double-needle sleeve and bottom hem