Shox R4+, Vibram Sphike [2002]The first Shox model to hit the shelves in 2000 was the Shox R4. However, The R4 lineage would quickly grow, thanks to the introduction of the Shox R4+ in 2001. Unique while still traditional in design, the R4+ featured a moulded lightweight mesh upper with a stretch lace shroud and zipped closure. The evolved R4 design served runners an alternative, futuristic aesthetic while still providing the same Shox cushioning in the heel. This pair has been