Vintage Chicago Southside Irish 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 Chicago Southside Irish T Shirt.Popular Chicago St Patrick's Day shirts and apparel. Sweet Home Chicago T Shirts for men,women and kids. Lightweight, Classic fit, Double-needle sleeve and bottom hem