The Heavy Woollen District is a region of textile-focused industrial development in West Yorkshire, England.
][2] The district is made up of parts of the modern day boroughs of Kirklees, Leeds and Wakefield in West Yorkshire, England.
The area was one of the key textile centres in Yorkshire, famed for its production of shoddy and mungo.
[7][page needed][8] For years companies had tried to blend different fibres without success leading to the term, "munt go", i.e. "mustn't go" as a Yorkshire colloquialism.
The Heavy Woollen District branch of the General Union of Textile Workers was formed in 1892 to service the needs of the local population.