Personalized 4th Birthday Pirate Ship Party Women's V-Neck T-Shirt. 4th birthday this little pirate is four Women's V-Neck T-Shirt - Aqua for a boy turning 4 years old. 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