Personalized Whatif I Love to Swim with Whatif Monster Men's Tank Top. Take a dip with the Whatif Monster! Whatif I Love to Swim with Whatif Monster Men's Tank Top - White, from the hit children's book, "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. Pre-shrunk 100% cotton 6.1 ounce Quarter turned Adult: S, M, L, XL, 2XL