The perfect entry level trail runner returns in a new package from the ground up. The platform gets a total redesign for a fresh ride. Here&';s the nitty gritty - Topo has updated the stack height to 28 x 23 mm for increased cushioning and bumped the drop to 5 mm. They added their ZipFoam(TM) midsole for a soft step in feel with increased response. Topo&';s newly refined VibramA(R) XS Trek EVO outsole provides excellent multi-surface traction and durability, catered specifically to light to moderate trails.