Personalized Grandpa is my Hero Youth T-Shirt. My grandpa is a superhero! He is my hero! Comic book theme t shirt for your child to wear on Father's Day, or any day. Grandpa will love it! 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.