The kilt is a knee-length garment with pleats at the rear, originating in the traditional dress of men and boys in the Scottish Highlands of the 16th century. Since the 19th century it has been associated with the wider culture of Scotland in general, or with Celtic (and more specifically Gaelic) heritage elsewhere. It is most often made of woollen cloth in a tartan pattern. Although the Scottish kilt is most often worn mainly on formal occasions or at Highland games and sports events, it has also been adapted as an item of fashionable informal, and formal, male clothing in recent years.
The history of the kilt stretches back to at least late 16th century. The kilt first appeared as the great kilt, a full-length garment whose upper half could be worn as a cloak draped over the shoulder, or brought up over head as a cloak. The small kilt or walking kilt (similar to the "modern" kilt) did not develop until the late 17th or early 18th century, and is essentially the bottom half of the great kilt.