The KSO Trek is a more rugged version of the popular KSO. The kangaroo leather upper and sock liner feel soft against the foot, yet are strong and tear resistant, with outstanding breathability. A 4mm EVA midsole offers plating protection from stone bruising, and a lightly cleated 4mm Vibram performance rubber outsole delivers improved traction on trails and over more rugged terrain. The KSO Trek is best for light trekking, trail running, & travel.