Zoot Women's Ovwa 2.0 Running Shoe 100% Textile and Manmade Imported Rubber sole Shaft measures approximately Low-Top" from arch Z-Bound - Less weight, better cushioning. Over the long haul, the super-light proprietary Z-Bound midsole rebounds a runners energy, reducing stress and fatigue. TriDry - Will keep your feet dry and light. CarbonSpan+ - Offering tunable control that maximizes a smooth, powerful toe off for effortless forward momentum without forefoot fatigue. BareFit Construction - Allowing for sockless wear and ultimate comfort. QuickLace - Providing speedy on / off for ultra fast transitions.