Personalized Mechanical Genius Toddler Full Zip Hooded Jacket. Mechanical Genius text with a wrench is a humorous gift design for mechanics and vo-tech students at back to school, birthdays, holidays and graduation. 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.