Personalized Half Irish Youth T-Shirt. Half Irish text that is half green with a shamrock dotting the letter i in the word Irish is a humorous gift design for St. Patrick's Day and Celtic festivals. 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.