The KSO, named for its new feature is designed simply to Keep Stuff Out. The vibram five fingers womens kso are the most popular women's five fingers shoe because of its comfort and versatility. The hoop and loop closure mechanism can protect your foot and provides you with a flexible movement. The vibram five fingers womens kso has an additional feature of increasing surface grip so that it is more desirable to use on muddy ground compared to standard or classic vibrams. Whether outdoor barefoot running, trekking or indoor yoga classes, vibram five fingers womens kso are the best choice for you. With abrasion-resistant stretch polyamide and stretch mesh, the shoes are very breathable and comfortable. The quick drying upper and non-marking flexible razor-sipped sole make it suitable for various activities.