Mighty Good Undies Men's Trunk

Certified organic and Fairtrade cotton trunks from Mighty Good Undies. Trunks offer optimal support, flexibility, and comfort, with longer legs for more coverage. Available in white, black, or grey.

Available in sizes XS-XXL - see size guide below. 

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From $20.26

$28.95 GST incl.

(price reduced by 30%)

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the brand story:

Australian company Mighty Good Undies hold ethical production at the heart of everything they do. They achieve this by sourcing the finest certified organic and Fairtrade cotton, and partnering with the world’s best ethical factories. Mighty Good Undies' supply chain is certified by the;

Global Organic Textile Standard: ensures that the environmental and health impacts of cotton production are actively managed and minimised and that workers are paid fair wages and work in safe conditions.  

Fairtrade Labelling Organization: ensures that the farmers who grow the cotton receive a fair price for their product and have enough funds to invest in their businesses and communities.

SA8000 Social Accountability Standard: the leading international standard for meeting ethical labour standards.

The cotton used by Mighty Good Undies is supplied by one of three organisations, who all have a strong commitment to supporting small scale organic and Fairtrade cotton farmers in India;

Chetna Organics: work with 35,000 small scale farmers throughout the Rainfed regions of central India.

Suminter Organics: work with over 20,000 farmers in nine Indian states.

Noble Econtech: one of the largest Fairtrade cotton producers in the world. 

you are making a difference:

Compared to conventional cotton, the cotton used by Mighty Good Undies uses;

  • 46% less CO2 emissions. 
  • 65% less water from irrigated sources.
  • 61% less energy.
  • Fairtrade and organic cotton creates a 70% reduction in the pollution that creates acid rain and soil acidification.
  • Each pair of underwear is paired with a 1kg carbon emission offset. 


  • Trunks offer optimal support, flexibility, and comfort, making them the perfect everyday choice. 
  • Trunks have longer legs for more coverage. 
  • Choice of white, black, or grey colour.
  • Comes in a reusable organic cotton bag.
  • Cold machine washable; extend the life of your trunks by washing them in a laundry bag. 
  • Available in sizes XS-XXL.

dimensions / materials:

Made from 95% certified organic and Fairtrade cotton and 5% elastane. 

Trunk Size Guide:

MeasurementNatural Waist MeasurementNatural Hip Measurement

end of life:

Mighty Good Undies suggests giving your undies a second life by turning them into cleaning rags, using them as stuffing for cushions and toys, or knotting them for use as pet toys. Alternatively, take them to your local textile recycling depot. 

Made in India. 

Browse our other organic underwear

By on 17 Apr. 2019 (Mighty Good Undies Men's Trunk) :

Wasteful packaging

Reasonable undies. However, each pair is packaged in its own unnecessary calico bag. This is extremely wasteful and was unexpected from Biome.

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