Pearl Izumi Women's EM Road H3 Running Shoe 100% Synthetic Imported Rubber sole Seamless upper provides support and structure in a lightweight seamless package. Transfer dry spacer mesh keeps feet cool and comfortable Biomechanically tuned e:motiontm midsole features our most cushioned and stable platform. 1:1 energy foam in forefoot cushions upon impact and returns energy back 1:1 energy foam in heel cushions upon initial ground impact. High-Density post at heel through mid-foot for pronation control Heel stack height: 25 millimeter (includes midsole and outsole). dynamic offset: 4 millimeter at initial contact to 7.5 millimeter at mid-stance Carbon rubber in the forefoot and crash pad offers long lasting cushioning and excellent abrasion resistance