Personalized Engineer Text Shamrock Men's V-Neck T-Shirt. A 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. 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem