Originally designed as an innovative running shoe, Nike released its Shox R4 back in 2000. Inspired by spacesuits, a 'Racer Blue' upper is topped with 'Metallic Silver' accents, which boasts laser perforations across the design. Holding up the heel are four compressive columns that deliver astronaut-inspired bounce and forward propulsion, while the Pebax stability plate keeps you grounded. | HJ7303-445, Textile & Synthetic Upper/Synthetic Sole.