These shoes feature technology developed in partnership with the Biomechanics Institute of Valencia. They have a padded heel and sides that aid the ankle’s natural movement, reinforced toe, hyper-ventilation, antibacterial treatment, super-grip, flexibility, maximum breathability. Easy slip on/slip off thanks to the Velcro system. Removable leather insole with an antibacterial system. Chrome and brass free quality natural materials. Good for a wide foot.