Personalized World's Coolest Chemist Long Sleeve T-Shirt. World's coolest chemist text with a snowman holding a bubbling beaker is a funny design for chemists, students and teachers at birthdays and holidays. 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