Personalized Yay! 21 Fun White Women's V-Neck T-Shirt. Yay! 21 and ready for fun in white text in a decorative white swirl is a fun design for friends and family at birthday time. 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