shoes Sidi Alba 2 are a shoe specifically designed for road cycling. Feature with a locking system hybrid. It combines two systems well known and they do not disappoint. In the upper part of the instep is a practical and efficient closure type BOA, with which you can set to the nearest millimeter the distance. Followed by the closing of a BOA, you are Sidi Alba have a double velcro closure. The combination of both is perfect, so that we achieve a perfect fit to the foot, favoring the pedaling even at the ports, more hard.;Features;- Upper of Politex;- Sole Millennium 4 Carbon Composite Sole;- Pad-replaceable heel;- System Soft Instep 3;- System Tecno-3;- Heel Sidi;The sneakers Alba Sidi are made of Politex. Built from several layers with different properties fisicomecánicas. Then, the PVC compact is paired with two different fabrics (knitted fabric + felt) that are dyed for greater colour retention. The Politex offers a high resistance to tearing, laceration, stretch and deterioration. This has been manufactured in compliance with strict european regulations and is a product that is totally eco-friendly.;Technology;- The system Techno-3 Sidi fit throughout the shoe Dawn of Sidi road, adapting the upper to the shape of the foot for a custom fit. The famous seals replaceable and reliable of Sidi have been enhanced by a new material called Sidi Wire. Such material helps to make adjustments at the time intuitive and effortless. As most of the small parts of Sidi, the Techno-3 Buckle is totally replaceable.;- The reinforced heel helps hold the foot in a optimal position and avoids the shoe being deformed by an excessive power, or by prolonged pressure.;- The sole Millennium 4 Carbon Composite, used in the Sidi Alba, has carbon fibre injected into a matrix of nylon, providing more rigidity than a shoe outsole nylon standard. This sole is more durable, completely insulated from the water and mechanically stable, meaning it is less susceptible to changes in stiffness resulting from time and temperature changes or moisture. An insertion of a toe antideslizamientos and a pad of polyurethane replaceable heel are built into the shoe for a higher performance-to-foot. The sole Millennium 4 Carbon Composite uses a pattern of three hole standard compatibility-extensive with the best pedals available. Includes a side painted and alignment of the coves as well as the Look Memory Eyelet for easy alignment and replacement.