Some people working in third-world countries for Olympic sponsor Adidas - which produced the official Team GB outfit - are paid less than 68p an hour, the sports giant has admitted.
Countering allegations made at a protest in central London that these workers were paid as little as 34p an hour, the firm insisted the wage rate was "almost double" that figure.
An Adidas spokesman said: "Adidas takes all allegations about working conditions extremely seriously and is fully committed to protecting worker rights."
Anti-poverty campaigners targeted Adidas stores across the country over claims relating to workers in some of its contracted factories.
Protesters attempted to attach labels branded with "34p - Exploitation" to items of clothing, which they say is the hourly wage rate for workers in Indonesia making the brand's goods.
Anti-poverty charity War on Want handed out 14,000 protest price tags to activists who gathered at Adidas's own-brand outlets, including their flagship store in London's Oxford Street, as well as retailers who stock their products.
The demonstrations also followed reports that Olympic organisers were investigating claims factory workers in Cambodia earn only £10 a week basic pay to make Adidas's licensed fan wear for the Games.
Campaigner Murray Worthy, from War on Want, said: "Adidas is clearly now on the rack through growing pressure over sweatshops. Thousands of our tags are being put on its products across the country. It is high time Adidas ensured a living wage for its factory workers."
The London Organising Committee for the Olympic Games (Locog) has launched an investigation after workers at Adidas's Shen Zhou factory in Cambodia told the Daily Telegraph they earned a basic salary of 61 US dollars (£40) a month for working eight hours a day, six days a week, plus a five US dollar (£3) allowance for healthcare.
Adidas said that workers at the factory made an average of 130 US dollars (£83) a month and would receive a wage increase from September. An Adidas spokesman said: "We are confident we are adhering to and, in fact, exceeding the high standards set by Locog."