Personalized 100 Days Of Cray Cray | 100 Days Of School T-Shirt. Our 100 Days Of Cray Cray design features vibrant colors and playful crayon illustrations, adding a touch of fun and excitement to any outfit. Whether you're attending a school event or simply want to showcase your enthusiasm for learning, this apparel is a fantastic choice. 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.