Personalized Ballin' Through 100 Days of School T-Shirt. As students reach this pivotal point in the school year, our collection serves as a reminder of their hard work, dedication, and the joy of learning, making it a perfect way to celebrate this important occasion. 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.