Personalized Class of 2020 Rocks T-Shirt. Class of 2020 rocks text with three happy dancing rocks holding class of 2020 flags is a humorous gift design for school students excited about graduating in 2020. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.