Zoot Women's Ultra Race 3 Running Shoe 100% Synthetic and mesh Rubber sole UltraFit Upper - A unique compression design to boost performance and reduce weight. Z-Bound - A Midsole layer which provides better cushioning. CarbonSpan+ - Offering tunable control that maximizes a smooth, powerful toe off for effortless forward momentum without forefoot fatigue. Weight: 224g Midsole Height: 19mm/9mm