X marks extreme. Exaggerated. Remixed. From the ‘80s PUMA Archives, the original Running System (RS) was an innovative cushioning technology revolutionary for its time. We’ve updated the RS for this generation to create the RS-X. With its bulky design, bold color palette, and retro style, the RS-X celebrates extreme reinvention.RS-X Fourth Dimension pushes boundaries and conventions with contrasting prints and a loud colorblock design.