Pearl Izumi Women's EM Road N1 v2 Running Shoe 100% Synthetic Imported Rubber sole Fall/Winter 2016 Dynamic offset-shaped midsole is biomechanically tuned for a neutral to supinator running gait. With 1:1 Energy Foam in forefoot cushions upon impact and returns energy back Blown rubber in the forefoot and carbon rubber in the crash pad combine for premium cushioning and abrasion resistance Dynamic Offset: 1 millimeter at initial contact to 4.5 millimeter at mid-stance. Heel Stack Height: 22 millimeter (includes midsole, outsole and EVA Strobel board)