Personalized I Just Hit 100 Days Of School T-Shirt. Designed with love and attention to detail, our "I Just Hit 100 Days Of School" apparel features a cheerful and vibrant design that showcases the excitement of reaching this educational achievement. 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.