Personalized Irish American Flag Youth T-Shirt. Irish American pride Youth T-Shirt - Navy with USA flag and shamrocks in the national flag colors of Ireland. St. Patrick's Day, St. Paddy's Day. Irish novelty gifts for parades and parties. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.