The KSO remains among our most popular styles for women for its unbeatable comfort and versatility. It features a thin, abrasion-resistant stretch polyamide and breathable mesh upper that wraps your entire forefoot to Keep Stuff Out." A single hook-and-loop closure helps secure the fit. The non-marking 3.5mm Vibram TC1 performance rubber outsole is razor-siped for enhanced flexibility and a sure grip on wet or dry surfaces." These are completely different shoes. They are meant to make you feel barefoot, but still provide some kind of protection. These shoes are perfect for athletic people who want to keep their feet healthy and strong. The KSO is best for Running, Fitness Training, CrossFit, Light Trekking, Bouldering, Water Sports & Travel