Personalized Mustangs Long Sleeve T-Shirt. Mustangs! Powerful, strong, fast. They're your school team. Contact us if you would like something customized. 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