Personalized Baby's 1st Birthday Polka Dot Women's V-Neck T-Shirt. Baby's 1st Birthday Women's V-Neck T-Shirt - White has cute baby wearing a polka dot birthday party hat. 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