NIKE Big Boys' KO Basketball Pullover Hoodie PLEASE NOTE: SIZE MAY RUN SMALLER, IF YOU NOT SURE ORDER ONE SIZE UP Your young baller can show off his style and love of the game with the Nike boys' KO basketball pullover hoodie. It's built with Therma-FIT technology to help keep the warmth in and the wind out, which means it's perfect for outdoor pickup games -- or he can just wear it casually for a little extra protection from the cold.