Cardio? I Thought You Said Party, Yo! Fun Work-out 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 Do you want to hang out or do some exercise? I thought so. Have your excuse ready for the next time someone asks you to go to the gym. Lightweight, Classic fit, Double-needle sleeve and bottom hem