The Kaos AirCarbon Road Shoe from Sidi is essentially the same shoe as the Kaos Carbon, but features a fully perforated upper for maximum ventilation and breathability, making it more of a summer season-only shoe. The Kaos Carbon series matches technology from higher end shoes, with the proven features of the Genius series shoes and the Millennium 4 composite carbon sole. Along with a Tecno 3 system, you get the famed Sidi fit and performance you expect from the Italian company. The top strap and buckle is the ratcheting, multi-adjust Caliper system with the Soft Instep 2 pad that distributes even, comfortable pressure over the top of the ankle for secure fit and exceptional comfort. Sidi's reinforced heel retention system is famous for it's anatomic heel cup and stable hold.

The composite carbon Millennium 4 sole features a base matrix of the Nylon, which is then injected with carbon fiber. This make it much stiffer than a Nylon sole (especially over time and use), but not quite as stiff as the top end carbon soles. Many riders actually prefer this design, feeling it more forgiving and in tune with the upper. In the end, you get great performance, comfort and power transfer without the high cost of the stiffest carbon sole. The three-bolt delta style cleat interface is standard with the Millennium 4, as are the firm toe tap, and soft replaceable heel pad

Aside from the perforated upper, perhaps the best functional feature of the Kaos Air Carbon is the Tecno 3 closure system. Sidi's high-end retention system is used to ensure a sung, comfortable fit on the fore and mid foot. This single ratchet pulls the Sidi Wire system from the metatarsal bridge to just below the Soft Instep 2 pad. You get a proven retention system that delivers an uncompromising fit, and fully takes advantage of the supple synthetic upper. Tecno 3 is micro-adjustable and secure, and just as with the Caliper system, replacements are always available. Sidi shoes are known for superior fit, longevity, and Italian style, and the Kaos Air Carbon is no exception.