Zoot Women's Ultra Speed 2 Running Shoe 100% Synthetic Rubber sole UltraFit Upper - A unique compression design to boost performance and reduce weight. ZVA - Incorporated between you and the road, providing a smooth ride to protect your foot. CarbonSpan+ - Offering tunable control that maximizes a smooth, powerful toe off for effortless forward momentum without forefoot fatigue. Weight: 180g Midsole Heights: 17mm/7mm