Shox R2 is the technology developed by Nike and incorporated into several of their flagship athletic shoes. Shox are small hollow columns that make up the midsole of the shoe. They are mostly made of rubber. There are many different formations that Shox R2 come in, but they usually come with four circular columns in a square formation for maximum cushioning. There can also be five or six Shox R2 that varies in height. And triangular and rectangular Shox R2 provides better stability.