Mens World's Greatest Grandfarter Shirt Grandfather Father's Day 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 A perfect gift for Father's Day! Available in multiple colors and sizes. Lightweight, Classic fit, Double-needle sleeve and bottom hem