Personalized Hydraulic Engineer Block Toddler Full Zip Hooded Jacket. Hydraulic engineer text with a decorative line sporting two drops in a colorful block, is a unique design for 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.