Zoot Women's Ultra Tempo 5 Running Shoe 100% Synthetic and mesh Rubber sole CarbonSpan+ - Offering tunable control that maximizes a smooth, powerful toe off for effortless forward momentum without forefoot fatigue. QuickLace - Providing speedy on / off for ultra fast transitions. 2-density midsole - Providing essential stability. Weight: 248g Midsole Height: 21mm/11mm