Personalized Geology Rock On Long Sleeve T-Shirt. Geology rock on text with a happy dancing rock is a unique science design for birthdays, holidays and graduation. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL