Personalized Whatif Monster Face Men's Tank Top. The Whatif Monster's anxious frown has suddenly been turned upside down with Whatif Monster Face Men's Tank Top - White. This green furry guy is the anxious creature who slowly learns he can't live his life based on "what ifs," from the 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