Personalized Proud Firefighter Brother In Law Youth Long Sleeve T-Shirt. Thin Red LineYouth Long Sleeve T-Shirt - White with black and red American flag with fire fighter emblem says Proud Fire Fighter Brother In Law. Show your pride in your courageous brother in law or sister in law. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)