Other ethical brands, such as bamboo fibre fashion brand Zhai and organic cotton clothing label Etrican, have also ramped up production in recent years.
Retail experts are not surprised at this trend.
Mr Samuel Tan, course manager of retail management at Temasek Polytechnic's School of Business, says: "Consumers are generally becoming more eco-conscious and aware of how their lifestyles can impact the natural environment."
He points to several reasons, including campaigning by overseas activists, as well as eco-friendly apparel becoming more readily available on the market.
Activist groups such as international environmental group Greenpeace have actively campaigned for clothing companies to stop releasing hazardous chemicals during the manufacturing process.
According to a Forbes report in December last year, the apparel industry accounts for 10 per cent of global carbon emissions and remains the second-largest industrial polluter, after oil.
The production of synthetic fibres also emits gasses such as nitrous oxide, known to be 300 times more damaging than carbon dioxide - a contributor to global warming. Other chilling facts include how polyester fibre takes more than 200 years to decompose.
This aside, eco-fashion is also taking off here because, well, it is becoming more fashionable.
With major fashion retailers such as Italian fashion company Benetton Group and H&M promoting sustainability, eco-friendly fashion has evolved past its association with frumpiness to become stylish and desirable.
More players in the market also meant more competition and a possible decrease in price, says Mr Tan, who predicts the trend is here to stay. "With more variety and competitive pricing, consumers are likely to buy more of such products," he adds.
"Ever-prevalent climate changes will also be a big push for many people to reflect on the human impact on the environment."
Yoga instructor and owner of online wellness magazine True Living, Mrs Katy Koyich-Pourrat, 27, has been buying gear from Touch The Toes since 2014.
The British Canadian, who lives in Singapore, now buys only sustainable and eco-friendly fashion - a decision she made after watching the documentary film, The True Cost (2015), that detailed the impact of fashion on the planet.
"It makes me feel good about what I'm wearing and my choices as a consumer," she says.
However, shoppers such as Ms Amanda Ang, 28, were not drawn to green fashion for eco reasons. The counsellor buys dresses from H&M's conscious collection because they look good.
She says: "It's more important that I'll wear the clothes and that they fit my style. The clothes being more eco-friendly is a good bonus, but not a strong incentive."
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