InspirationzStore Typography - Worlds Greatest Pop - Best dad in the world - blue text on white - great for fathers day - T-Shirts - Adult Light-Blue-T-Shirt Large (ts_151317_52) Adult and youth sizes are a blend of 50% cotton, 50% polyester. Toddler sizes are 100% cotton. Available in white, grey, light blue or pale pink. Custom printed image applied. Washing instructions: Do not use bleach, dry on low heat, turn inside out