Personalized Whatif Monster T-Shirt. What if you took that chance, and discovered just how great you are? Whatif Monster T-Shirt - Pacific Blue from the children's book, "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. Everyone loves our Custom T-Shirts! 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.