Jeans are a type originally developed as hard wearing work trousers for American miners. They are made from woven cotton with a white weft and coloured warp, a style of fabric first developed at Nimes in France, whence the name sergedenim or denim as it became. Jeans have a fly front fastening, top stitching, back yoke detailing and beltloops. Traditionally they were indigo blue in colour, later developed in many colours. Research Jeans