Personalized Proud Firefighter Step Dad Youth T-Shirt. Thin Red LineYouth T-Shirt - Kelly Green with black and red American flag with fire fighter emblem says Proud Fire Fighter Step Dad. Show your pride in your courageous step son or step daughter. 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.