The ceinture fléchée [sɛ̃tyʁ fleʃe] (French for "arrowed sash"; English: L'Assomption sash or "arrow sash") is a type of colorful sash, a traditional piece of French-Canadian clothing of the 19th century (of the Lower Canada, Canada East and early confederation eras). The Métis also made ceintures fléchées and use them as part of their national costume. While the traditional view is that the ceintures fléchées is a French-Canadian invention, others propose a different view on its origin. According to Dorothy K. Burnham who prepared an exhibit on textiles at the National Gallery of Canada in 1981, and published an accompanying catalogue raisonné, this type of finger weaving was learned by the residents of New France from the indigenous peoples.
In Quebec, this wool sash was used by men to tie jackets around their waists to prevent the cold from creeping in. It was a both practical and fashionable accessory, worn by both the bourgeois and the habitant classes. The width of a traditional belt can be 15 centimetres to 25 centimetres, and its length can easily be more than 2 metres. The ceinture also had a practical use: it helped prevent back injuries or hernias amongst the fur traders of the time.
It is adorned by an arrowed pattern and was worn around the winter coats of the time. It is also a symbol of the Lower Canada Rebellion and the Quebec Winter Carnival, as it is worn by the festival mascot, Bonhomme Carnaval. Imitations are sold and seen throughout the carnival. The belt is represented in a number of artistic creations, such as the illustration Le Vieux de '37 by Henri Julien, the painting L'Assemblée des six-comtés by Charles Alexander Smith and the song Mon Pays, suivi du Reel des Aristocrates from néo-trad musical band Les Cowboys Fringants.