Authentic Heritage  The I-5923 provides authentic adidas heritage, honoring the rich archives of the brand with a perfectly executed modern take on classic models. Retro running icons like the Boston, ZX 500, and many more favorites from the past head straight into the future with a design that combines their defining elements with modern Boost cushioning. The seamless combination of vintage looks and modern comfort was an instant hit, as the I-5923 became a quick favorite for Boost-loving