Personalized Ballin' Through 100 Days of School T-Shirt. This unique design captures the spirit of achievement and fun, making it an ideal choice for students, teachers, and parents alike. 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.