From rocky hills to muddy valleys, the Dynafit Alpine Trail trail running shoe delivers a confident strike and efficient stride for miles on challenging terrain.. Seamless, padded tongue reduces friction and pressure ensuring a fit without distraction and the rear preload strip locks into the heel increasing stability when landing and helping us during transitions. As we pick up the pace and rack up the miles , Vibram Megagrip outsole eats up the road, wet or dry ensuring no energy leakage.