Boasting Rearfoot and Forefoot GEL Cushioning and a bouncy SpEVA midsole, the new GEL-Flux 3 is athletic, cushioned, and even a little bit peppy. SHOE TECHNOLOGIES Rearfoot and Forefoot GEL Cushioning System Guidance Line and Guidance Trusstic System keep the ride smooth and efficient. SpEVA midsole material improves bounce back characteristics and decreases midsole breakdown. Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency.