Personalized Leopard Rainbow 100 Days Of School T-Shirt. Whether it's for a school event or just to commemorate the 100th day of school, this apparel is a great choice. It's a wonderful way to show off your child's achievement and make them feel proud. Get ready to make memories with our Leopard Rainbow 100 Days Of School design! 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.