Traditionally the http://nike.com”>Nike Air Tech Challenge II has come in lighter colors with vibrant neons, a reflection of Andre Agassi’s style both on and off of the tennis court. Recently however, Agassi’s second signature shoe has been offered in decidedly more classic colorways and materials, including a http://freshnessmag.com/2014/06/06/nike-air-tech-challenge-ii-burgundy-suede/”>burgundy suede and this “Obsidian” blue version. The upper is a combination of suede and leather with a micro-perf toe-box, and sits on an all white sole. While the signature splatter is still there, these shoes are decidedly more grown-up than previous versions. Stay tuned for the official release date, but until then look for these to release some time in September.