Personalized It's Been A Wild 100 Days Of School T-Shirt. Celebrate the milestone of 100 days of school with our adorable "It's Been A Wild 100 Days Of School" design! This cute and happy design is perfect for showing off your child's achievement. Whether they're in kindergarten or elementary school, this apparel will make them feel proud and excited about their progress. 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.