If At First You Don't Succeed Tee Math T ShirtThis Is If At First You Don't Succeed Try Doing What Your Math Teacher Told You To Do The First Time Tees. Great Gift Idea For Math Lovers,Math Teachers. Lightweight, Classic Fit, Double Needle Sleeve And Bottom Hem 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