Personalized Structural Engineering Hero Toddler T-Shirt. Structural engineering hero in arched text is a funny gift design for engineers and engineering students. 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.