As a dairy farmer, O'Malley had not known anything about the fibre industry but she found it fascinating.
Simultaneously, they were learning about hemp, another rising trend.
Afterwards, when she had the idea about a possible merger of the two fibres, she approached Ensor, a Canterbury high-country farmer, who thought it was a "cool idea".
The initial research and development was undertaken by O'Malley, who in addition to her farming role is co-founder of charity Meat the Need, and Ensor.
More recently, as they were close to having a workable product, Bell was brought in with sales and marketing experience.
It had been a "great fit", O'Malley said.
Experience was gained with offshore spinners in China and Italy before all production of the limited first run of the Hemprino Pioneer crew, which launched earlier this month, was returned to New Zealand.
The variety of hemp sourced was a special variety for fibre and New Zealand-grown hemp, of the quality required, was not yet available, so they were sourcing it from China.
Carrfields had partnered with Hemp NZ to research and develop the hemp fibre industry under a new company, New Zealand Natural Fibres.
O'Malley said Hemprino would love to be its customer as the trio, as farmers, believed in hemp as a plant, thinking it would be a great diversification for New Zealand.
Hemprino was a lightweight fibre and the jersey was very warm, soft and breathable, O'Malley said.
The idea was to gauge people's feedback and then broaden the range and colourways. The product was already attracting interest from overseas markets.
Listen to Jamie Mackay interview Siobhan O'Malley about Hemprino on The Country below:
O'Malley, who with her husband Christopher won the share farmer of the year title in 2017 and also works full-time as a school teacher, said it had been a "fantastic process", particularly learning about manufacturing.
The O'Malleys recently bought their first farm, inland from Hokitika, which they were moving to on June 1, and she was very excited.
They would not have done that if they did not "absolutely believe" in the future of agriculture, she said.
"It's been a very long journey [to farm ownership] and it's really exciting to tick that off and put down some roots."