Personalized POP POP Man Myth Legend Youth T-Shirt. POP POP. The man, the myth, the legend. Celebrate pop pop on Father's Day with this cool, well deserved, Youth T-Shirt - White. 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.