Pearl Izumi built the Women's EM Tri N 1 Running Shoe for race day, when you need pure performance and nothing less. This fast and light short course specialist was designed with quick transitions in mind and boasts breathability, quick lacing, and a liner for sockless comfort. The mono spacer mesh upper offers maximum ventilation and drainage, and the seamless construction provides lightweight, supple support. Underfoot, the Ortholite insole provides excellent step in comfort.But comfort is only one component of a quality performance shoe. Run to your fullest potential with the biomechanically tuned dynamic offset shaped E:Motion midsole, which features a lower drop platform that works with your foot as you move through your gait to promote smooth and efficient turnover, while the 1:1 Energy Foam cushions forefoot upon impact and returns energy back to you. The outsole combines outsole grade EVA with blown rubber in forefoot for cushioning without energy sapping weight.