Personalized Rockin' Grandma Women's V-Neck T-Shirt. Rockin' Grandma Text with a happy dancing rock is a funny gift design for grandmothers on Mothers Day and Grandparents Day. 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