Personalized I Just Hit 100 Days Of School T-Shirt. Celebrate your child's milestone with our adorable "I Just Hit 100 Days Of School" design! This cute and happy apparel is perfect for commemorating this special occasion. Whether it's for a school event or just to show off their achievement, this design is sure to bring a smile to everyone's face. 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.