The Vibram Women's Fivefingers Kso Gray Green is wanted by everyone. KSO means keep stuff out, which you can know this series is mainly for outdoor activity. Its Five Fingers are re-designed off of the Vibram Five Finger Classics, but with higher coverage on your feet to keep stuff out!The Vibram KSO's are made with a thin, abrasion-resistant stretch polyamide mesh fabric which fits up over your arch on the foot - for comfort and quick drying.