The Mackintosh or Macintosh (abbreviated as mac or mack) is a form of waterproof raincoat, first sold in 1824, made out of rubberised fabric. The Mackintosh is named after its Scottish inventor Charles Macintosh, though many writers add a letter k (this variant spelling "Mackintosh" is now standard. Although the Mackintosh style of coat has become generic, a genuine Mackintosh coat should be made from rubberised or rubber laminated material.
Charles Macintosh patented his invention for waterproof cloth in 1823 and the first Mackintosh coats were made in the family's textile factory, Charles Macintosh and Co. of Glasgow. But in 1830 the company merged with the clothing company of Thomas Hancock in Manchester. Hancock had also been experimenting with rubber coated fabrics since 1819. Production of rubberised coats soon spread all over the UK. Every kind of coat was produced with rubberized material including riding coats and coats supplied to the British Army, British Railways and UK police forces. Early coats had problems with smell, stiffness, and a tendency to melt in hot weather, but Hancock further improved their waterproof fabrics, patenting a method for vulcanising rubber in 1843 which solved many of the problems. Throughout the 19th and 20th centuries, the company continued to make waterproof clothing. In 1925 the company was taken over by Dunlop Rubber.