Personalized Big Sister Superhero Women's V-Neck T-Shirt. Big Sister Superhero! The big sister looks out for her younger siblings, just like a true superhero should. Great Women's V-Neck T-Shirt - Black for any super sis! 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