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The most common materials used to produce a T-shirt are cotton and polyester.
Big multinational textile companies fabricate the clothes in underdeveloped countries because they can pay very low wages to the workers, The workers accept the low pay because they are poor and are needed for some money to make a living. Many experts considered this as a form of labor exploitation.
Some of these countries that fabric textiles are Malaysia, Indochina, Thailand, and Honduras,
China, although is not an underdeveloped country, also pays low wages to its workers to produce all kinds of clothes for renowned brands.