Personalized Mechanical Engineer Gear Sketch Toddler Full Zip Hooded Jacket. Mechanical Engineer text across a gray sketch of a gear is a unique engineering design for engineers and engineering students at 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.