Hydraulic Engineer Toilet Plunger Funny Engineering T-Shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Hydraulic engineer text with an image of a toilet plunger is a humorous gift design to tickle the funny bone of plumbers, hydraulic engineers and engineering college students. Design copyright Karen A Barthol. Lightweight, Classic fit, Double-needle sleeve and bottom hem