KSo

The men's KSO features a thin, abrasion resistant stretch nylon and breathable mesh upper that wraps your entire forefoot to "keep stuff out." A single hook-and-loop closure helps secure the fit. A non-marking 3.5mm Vibram TC1 performance rubber sole is razor-siped for a sure grip, and a 2mm EVA midsole enhances plating protection and comfort.

Bikila

The women's Bikila features a Dri-Lex covered 3mm polyurethane insole and a 4mm anatomical pod outsole design that offers more plating protection , adn distributes forefoot impact without comprimising important ground feedback essential to a proper forefoot strike running form. A more athletic padded collar and topline, a single hook and loop closure, 3M reflective surfaces, and tear resistant TPU toe protection finish off this breakthrough design.