running Shoes Sidi Wire 2 Carbon with top microfiber Techpro Polyurethane, sole Vent Carbon Sole, closure Soft Instep 4 Closure System and Techno 3 System, and device for retention of the heel.;Features;- top of microfiber Techpro;top microfiber Techpro Polyurethane Made in Italy a microfiber highly technological and innovative, environment-friendly, suitable for technical products and sports that require high levels of performance. Incorporates characteristics of resistance, stability, light weight, water repellency and respect for the environment. Is certified Oeko-Tex and does not contain harmful substances.;- Locking system Soft Instep 4 Closure System;The strip of closure, wide, anatomical and padded, is made of a soft material thermoformed for comfort and performance. Distributes pressure evenly over the arch area of the foot, adjusting for both sides for perfect centering. The Soft Instep 4 Closure System is durable and replaceable.;- System Tecno 3 Push System;New dial Sidi Tecno 3 Push System for an optimum fit along the entire length of the shoe and with an upper part which is adapted to the shape of the foot for a custom fit. The dial Sidi Tecno 3 Push System allows an adjustment for the pedal, thanks to an innovative button which can be pressed to release the strip of closure, making it easier to adjust.;- Retention system Adjustable Heel Retention Device;New technology for the heel cup. The device adjustable retention of the heel reinforces the top of the heel cup and improves fit by closing the back of the shoe around the ankle of the cyclist. The device retention of the heel tightens the top of the heel cup so that they do not slip on steep climbs or sprints. Can be adjusted with two small screws that work independently. For a custom fit should be screwed towards the + sign to close the device retention of the heel while that should be screwed towards the - sign to open it.;- Heel Sidi Heel Cup;The reinforced heel keeps the foot in position and avoids the shoe being deformed due to extreme use or prolonged pressure.;- Sole Vent Carbon Sole: The new sole Vent Carbon Sole is lighter than its predecessors. The openings inserted in the front, when opened, offer an optimal and comfortable ventilation. The flow of air flowing through the channels enabled until it exits by the exhaust located in the central part of the shoe. In addition, the openings can be closed or open according to need. The openings have been designed to offer a great performance for cyclists who need a rigid sole without compromising the circulation of the blood towards the foot. And also, to ensure maximum comfort and optimal power transfer. The sole Vent Carbon Sole is constructed to provide a slight flexibility in the tip of the shoe while maintaining the stiffness along the body of the shoe. The sole Vent Carbon Sole Sidi is compatible with the best pedals on the market. To facilitate the replacement of the cleats, the sole Vent Carbon Sole features a scale alignment molded into the sole as well as the Look Memory Eyelet.