shoes Sidi MTB SD15 are compatible with cleats SPD and have the new mechanism Tecno-3 that allows you to close the shoe in its entire length, adapting the tongue to the shape of the foot, obtaining a footwear custom. They feature an outsole that offers the optimal combination of stiffness, weight and felxibilidad providing maximum adhesion while they are walking or pedaling.;Technologies;- System Tecno-3 System;New dials of Sidi's Techno-3 for an optimal fit along the entire length of the shoe and with an upper part which is adapted to the shape of the foot.;- Outsole Outdoor;The outsole Outdoor rubber and high performance, has a density that is perfect for tackling difficult terrain. Specific to provide maximum adhesion. Has been redesigned to offer maximum grip and to be able to easily remove the mud and debris.