Personalized Don't Push Long Sleeve T-Shirt. Nuclear Engineer, Don't push my buttons in a radiant yellow oval is a humorous design for nuclear engineers. Fun gifts for birthdays, holidays and graduation. 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