running Shoes Sidi Ergo 5 with top microfiber Techpro Polyurethane, outsole Twelve Carbon Composite Sole, closure Soft Instep 4 Closure System and Techno-3 Push 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.;- High Security Velcro;Velcro strap high-security with a teeth of plastic material integrated, which is engaged when the strip is closed. This feature makes the closure more secure and the strip is completely set.;- 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.;- Heel replaceable;The cycling shoes Sidi are equipped with heel on polyurethane replaceable.;- Outsole Twelve Carbon Composite Sole;Synthetic Twelve Carbon Composite Sole made of two materials, Nylon and carbon fiber, by injecting the carbon fiber in a Nylon matrix. The Nylon used doesn't absorb water and doesn't lose rigidity in hot climates or wet, or as you get older. The result is a sole significantly lighter and more rigid.