Personalized Whatif I Love to Swim with Whatif Monster T-Shirt. Take a dip with the Whatif Monster! Whatif I Love to Swim with Whatif Monster T-Shirt - Pink, from the hit children's book, "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. 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.