Women's Nike Shox R4 was one of these three. It was designed by Bruce Kilgore, of Air Force 1 and Air 180 fame, and Sergio Lozano, the designer of another highly popular and enduring Nike running shoe, the Air Max 95. The Women's Nike Shox R4 features a two piece, track inspired upper a great, lightweight, breathable fit while the full-length internal Phylon midsole and forefoot Air-Sole unit provide a smooth ride, and this Nike running shoe is designed for the neutral runner in need of maximum cushioning and impact protection.