Saucony Men's ProGrid Trigon 5 Guide Running Shoe 100% Nylon Stability Impulse EVA midsole provides increased shock attenuation, responsive cushioning, durability and rebound properties Heel ProGrid with Respon-Tek dissipates shock and sets the foot up for a smooth transition SRC Impact Zone and SRC Xtra forefoot cushioning provides shock attenuation and cushioning 11.6 oz