Personalized 100 Magical Days Of School | 100 Days Of School T-Shirt. This design features a playful and whimsical theme, perfect for capturing the excitement and achievement of reaching 100 days of learning. With its colorful and eye-catching elements, it is an ideal choice for students, teachers, and parents who want to commemorate this special occasion in style. 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.