Challenging terrain is no match for the exaggerated tread on the Huarache Gripp. On the track street or treadmill the Gripp has you covered. And comfort is no worry thanks to the inner bootie that hugs your foot in all the right places. Encapsulated Air-Sole unit cushions your entire foot so you can keep going mile after mile. Exaggerated tread provides excellent traction and grip. Inner bootie hugs your foot in comfort. Air-Sole unit cushions your entire foot.