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 Funny Half Marathon Runner T-shirt. Great gift idea for runners. This would make a perfect tee for your Marathon running team. This t-shirt features text that reads, I'm Only Half Crazy 13.1, with a half of a running shoe graphic Lightweight, Classic fit, Double-needle sleeve and bottom hem