Personalized Happy 100 Days Of School T-Shirt. Celebrate the milestone of 100 days of school with our adorable apparel featuring a delightful apple and pencil illustration design. This cute and happy design is perfect for students, teachers, and parents alike. Show off your school spirit and commemorate this special occasion with our unique and eye-catching clothing. 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.