The Sidi MTB SD15 shoes are compatible with SPD cleats and have the new Tecno-3 mechanism that allows the shoes to be closed in their entire length, adapting the tongue to the shape of the foot, thus obtaining a custom shoe. They have a sole that offers an optimal combination of rigidity, weight and flexibility, providing maximum adhesion while walking or pedaling. Technologies: Tecno-3 System System New Sidi Tecno-3 dials for an optimal fit along the entire length of the shoe and with an upper part that adapts to the shape of the foot. Suola Outdoor The rubber outsole and high performance has a perfect density to deal with difficult terrain. Specific to offer maximum adhesion. It has been redesigned to offer maximum adhesion and to be able to easily remove mud and debris.