Chicago Flag Heart 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 Vintage Flag of Chicago Heart T Shirts.Chi Town shirts available for men,women and kids. Popular Windy City retro tees available in many sizes and colors.Love Chicago Lightweight, Classic fit, Double-needle sleeve and bottom hem