Personalized Mechanical Heart Women's V-Neck T-Shirt. A mechanical gear heart design to tickle the funny bone of your mechanic or mechanical engineer at 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