Personalized PopPop Number 1 Racing Fan Long Sleeve T-Shirt. Pop Pop grandpa number 1 racing fan Long Sleeve T-Shirt - Black with black and white rally flags logo. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL