Vintage 4-Leaf Shamrock St. Patrick's Day 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 Distressed design lucky 4-Leaf clover St. Patty's Day shirt Lightweight, Classic fit, Double-needle sleeve and bottom hem