Product DetailsBoasting Rearfoot and Forefoot GEL® Cushioning and a bouncy SpEVA® midsole, the GEL-Flux™ 3 model is athletic, cushioned, and even a little bit peppy. The upper is built with supportive synthetic overlays and a breathable mesh for optimal fit and comfort, while the Guidance Line® Technology and Guidance Trusstic System® Technology keep the ride smooth and efficient. Weight: 11.5. Heel Height: 23mm. Forefoot Height: 13mm.