Personalized Coolest Engineer Toddler Full Zip Hooded Jacket. A snowman wearing a hard hat with text the world's coolest engineer is a humorous engineering design. Fun gifts for college students and engineers for birthdays and the winter holidays. 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.