Pauline Hanson has been slammed for selling One Nation party T-shirts which are made in Bangladesh.

The staunch nationalist, who fights for Australian workers, has been branded a hypocrite for outsourcing the $25 'I Trust Pauline Hanson' One Nation party merchandise.

'That is an extraordinarily bad call from One Nation,' Textile, Clothing and Footwear Union national secretary Michele O'Neil told The New Daily.

Pauline Hanson has been slammed for selling One Nation party t-shirts which declare they were 'made in Bangladesh'

'As a party that claims to be based on ordinary working people's lives, it shows the hypocrisy of that claim.'

Ms O'Neil said the revelation jeopardised Pauline Hanson and the One Nation party's integrity.

'All it says is you can trust Pauline Hanson to not support local workers and to promote her party on the backs of exploited workers in a third-world country,' she said.

Ms O'Neil said Bangladesh was one of the cheapest places to manufacture clothes in the world.

Pauline Hanson's One Nation party promotes a policy to buy 'Aussie Made' on its website

'I've got your back Australia': One Nation's Pauline Hanson at her election-night function in Ipswich in 2016

She said workers in the third-world country often endured horrific conditions.

The One Nation party promotes a policy to buy 'Aussie Made' on its website.

The party called for 'strict guidelines as to the origin of the product, where it is made, and identifying whether produced by an Australian company or foreign'.

One Nation pushed for a 'colour coded labelling system' – green for 'totally Australian' products, gold for 'either Australian product or Australian owned company' and red for 'totally foreign'.

The party also said it 'opposes globalism' and anything that harmed Australia's manufacturing industry.

Pauline Hanson's (pictured with Malcolm Roberts) One Nation Party spokesman told Daily Mail Australia the party knew the shirts were made overseas when they were commissioned

'The demise of our manufacturing industry has accentuated serious unemployment and financial problems,' it said.

A One Nation Party spokesman told Daily Mail Australia the party knew the shirts were made overseas when they were commissioned.

'We had a feeling for the price we got, they certainly weren't Australian made,' he said.

'Being a little party with less funding than the big boys, we need watch our money.

'You can get shirts from a million different places, but you've got to pay a premium to get them made in Australia.'

While the shirts were made in Bangladesh, he said the artwork and printing was done locally on the Sunshine Coast in Queensland

While the shirts were made in Bangladesh, he said the artwork and printing was done locally on the Sunshine Coast in Queensland.

'We try to support the local guys as much as we can - we had local couriers to deliver them around the country,' he said.

'If we continue on and do well, we will definitely buy Australian.'