Pearl iZUMi Women's Syncro Fuel Rd II Performace Shoe upper: 63% textile, 37% synthetic bottom: 100% rubber/plastic Imported Synthetic sole 1:1 Energy Foam cushions the foot upon impact and then returns energy back to the runner Full blown rubber outsole with carbon rubber heel crash pad Ortholite sockliner for amazing step-in confort and long-lasting cushioning 360? Performance Last