Mens Premium Quality Pop Pop - Grandpa 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 Retro label style white design: "Premium Quality Pop Pop. Genuine. Best in the world." Funny alternative to world's greatest or best grandpa shirt. Humorous birthday, holiday, special occasion or Father's Day gift for grandfather. Lightweight, Classic fit, Double-needle sleeve and bottom hem