Personalized Biological Engineering Heart Women's V-Neck T-Shirt. Biological engineering text in a heart with pimples is a humorous design for bioengineers. Fun gift ideas for birthdays, holidays, graduation and Valentine's Day. 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