Trouser clips

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Bicycle clips, also called trouser clips, are small C-shaped pieces of thin metal worn around the ankle when cycling in trousers. They are designed to prevent the bottom of the trousers from becoming caught in the chain or crank mechanism, and from being covered in oil and dirt. Additionally, they may have fluorescent (usually yellow) and reflective materials attached which make the cyclist more visible. Whilst popular in the past, they have been largely superseded by more comfortable fabric bands, which are also more securely fastened to the leg and often larger, providing a greater visibility benefit.