Personalized Christmas Tennis Ball T-Shirt. Embrace the holiday spirit and show off your sporty side with this fun and festive design that brings together the best of both worlds. 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.