Personalized Firecracker 1st Birthday Women's V-Neck T-Shirt. Cute Women's V-Neck T-Shirt - White 4th of July 1st birthday design with a big blue number one firecracker filled with red and white stars and star burst. Perfect for 4th of July first birthdays! 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