Personalized Proud Firefighter Son T-Shirt. Thin Red LineT-Shirt - Vintage Black with black and red American flag with fire fighter emblem says Proud Fire Fighter Son. Show your pride in your courageous mom or dad. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.