Personalized 100 Days Of School T-Shirt. Whether you're a student or a teacher, our 100 Days Of School design is a great way to show off your school spirit and celebrate this milestone achievement. Spread positivity and joy with this charming design that captures the essence of reaching 100 days of learning and growth. Perfect for classroom celebrations or casual everyday wear, our 100 Days Of School apparel is a must-have for anyone looking to embrace the excitement of this special occasion! 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.