The FiveFingers Bikila LS is designed to fit wider feet or high insteps. Perfect for running on the road, a Dri-Lex sock bed with a 3mm polyurethane insole keeps the feet comfortable and protected from shock. The 4mm rubber outsole is made with an anatomical design to allow all the benefits of barefoot running without the safety hazards of running on the road sans shoes. The upper is breathable to promote comfort, and the shoes also have 3M reflective surfaces.