Personalized Proud Firefighter Grandpa Youth T-Shirt. Thin Red LineYouth T-Shirt - Heather with black and red American flag with fire fighter emblem says Proud Fire Fighter Grandpa. Show your pride in your courageous grandson or granddaughter. 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.