Personalized 100 Days Of School T-Shirt. Celebrate the end of the school year in style with our Happy Last Day of School design! This fun and vibrant design features colorful illustrations and a joyful message that captures the excitement of summer break. Whether you're a student, teacher, or parent, this design is perfect for commemorating this special moment. 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.