Personalized 100 Days Brighter | 100 Days Of School T-Shirt. Celebrate a milestone with our adorable 100 Days Brighter design apparel! This cute and cheerful collection is perfect for commemorating your child's first 100 days of school. With vibrant colors and a playful design, it's sure to bring a smile to your little one'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.