Personalized Worlds Best Firefighter Long Sleeve T-Shirt. Personalized Worlds Best Firefighter gifts and apparel. Say thank you to any firefighter for their protection and hard work with this super Worlds Best Firefighter design that you can customize by adding a name on this Long Sleeve T-Shirt - White. It's a great appreciation thank you gift. 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