Pearl iZUMi Men's EM TRI N 2 v2-M Running Shoe 55% Textile Mesh/45% Rubber Imported Synthetic sole Seamless upper provides support and structure in a lightweight, seam-free package Dynamic offset-shaped emotion midsole is biomechanically tuned for a neutral to supinator running gait, sock-like upper construction and integrated quick lacing system promote lightning fast transitions 11 energy foam in forefoot cushions upon impact and returns energy back to the runner during propulsion 11 energy foam in heel cushions upon initial ground impact, blown rubber in the forefoot and carbon rubber in the crash pad combine for premium cushioning and abrasion resistance Dynamic offset 4 millimeter at initial contact to 7.5 millimeter at mid-stance, heel stack height 23 millimeter includes midsole and outsole