Personalized Chemical Engineer Zombie Fighter Toddler T-Shirt. Chemical Engineer I fight zombies in my spare time is a humorous gift design for engineering zombie terminators. What would this world be like without them? A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.