Personalized Body Builder Men's V-Neck T-Shirt. Bio Engineer, body builder text with a strand of DNA is a humorous design for biological engineers. Fun gifts for bioengineers at birthdays, holidays and graduation. 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