The Garment Workers' Union of South Africa (GWU) was a trade union representing workers in the clothing industry in South Africa.
In 1925, it established a section to represent factory workers in the industry, and this proved enormously successful; by the end of 1926, it represented 90% of clothing factory workers in the Witwatersrand region.
[1] The Government of South Africa banned Sachs from leading a trade union.
By 1953, 60% of the union's membership was classed as "coloured", although government legislation required separate branches for white workers.
In 1956, the white workers left to form the Garment Trade Union of European Employees.