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SIDI (stylized as SiDI) is an Italian company founded in 1960 by its current president Dino Signori, the company takes its name from his initials. It specializes in protective wear for sports such as motorcycling and cycling.
SIDI is one of the most well known brands of cycling shoes, its non-MTB shoes have been used by many famous professional cyclists to win many important races, including world championships. Originally, shoes were made with leather uppers and wooden soles. However, since the late 1970s plastics and other man-made materials, including: Lorica and carbon fibre have been used (in models such as Sidi Ergo 1 and Sidi Ergo 2).
Traditionally the shape of the shoes suited feet with a less broad toe area although there is now a "mega" size which is wider.
SIDI also produces some other cycling clothing, such as socks.