Personalized Plumbing Genius Toddler Full Zip Hooded Jacket. Plumbing genius text with a pipe wrench is a unique gift design for plumbers and vocational technical 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.