Personalized Engineer White Text Shamrock Women's V-Neck T-Shirt. A white shamrock made from the word Engineer and small shamrocks is a unique gift design for engineers and engineering students on St. Patrick's Day and at Celtic festivals. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit