It's All Fun & Games Until Someone Divides By Zero Math Tee 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 Unique, great looking and 100% custom designed Math Shirts. These Math T Shirts features a very attractive design with a funny message for Math geeks and lovers. Makes great math gifts for math lovers. Available for Men, Women & Kids. Hurry!!!Order Now!!! These Math T-Shirts are prepared on-demand JUST FOR YOU. You can be assured that you get the best and extremely new looking shirt rather than ages old looking t-shirt! A perfect math novelty clothing & apparel to wear for math geeks and nerds! Lightweight, Classic fit, Double-needle sleeve and bottom hem