A common myth in sustainable fashion is that natural is always good and synthetic is always bad. The truth is more nuanced: sustainability isn't only about the fibre, but about how a garment is made, how long it lasts, and what happens at the end of its life. So when people ask whether organic cotton or recycled polyester is greener, the honest answer is — it depends on the use. Here's a clear comparison of the two.
What is recycled polyester (rPET)?
Recycled polyester, or rPET, is made by collecting post-consumer plastic waste — like water bottles and fabric scraps — breaking it into pellets, and spinning it into new fibre. Roughly five plastic bottles can be re-spun into enough polyester for one t-shirt, diverting plastic from landfill and oceans and cutting the petroleum needed compared with virgin polyester. Quality rPET is often certified to the Global Recycled Standard (GRS) — a certification that verifies recycled content and responsible social and environmental production across the supply chain.
Where recycled polyester shines
- Diverts plastic waste from landfill and the ocean, and uses less energy than virgin polyester.
- Performance and durability — quick-drying, stretchy, and shape-retaining, the go-to for swimwear, activewear, and outerwear.
- Versatile — the same quality as virgin polyester, usable across clothing, bags, and homewares.
The catch: like all synthetics, recycled polyester sheds microplastic fibres in the wash that are too small for most water-treatment systems to catch, and it isn't biodegradable at end of life.
What is organic cotton?
Organic cotton is grown without synthetic fertilisers, harmful pesticides, or GMO seeds, using farming methods that protect soil health and biodiversity. (Conventional cotton, by contrast, is sometimes called the world's dirtiest crop — it uses about 16% of the world's insecticides on just 2.5% of agricultural land.) Organic cotton is prized for its softness, breathability, and skin-friendliness.
Where organic cotton shines
- Lower-impact farming — no synthetic pesticides, healthier soil, and less water than conventional cotton over time.
- Biodegradable — pure organic cotton fully decomposes at end of life, leaving no microplastics behind.
- Breathable and hypoallergenic — comfortable and gentle against skin, ideal for everyday wear.
Organic cotton vs recycled polyester: which is greener?
There's no single winner — it comes down to use case and end-of-life:
- For everyday clothing worn next to skin — tees, sweatshirts, layering — organic cotton is the greener choice: biodegradable, breathable, and sheds no microplastics.
- For performance gear — swimwear, activewear — recycled polyester makes more sense, because it diverts plastic and delivers durability and quick-dry function, even though it sheds microplastics and isn't biodegradable.
| Organic Cotton | Recycled Polyester | |
| Best for | Lounging, layering, daily wear | Swimming, surfing, high-intensity activity |
| Skin feel | Soft, matte, better with age | Sleek, smooth, lightweight |
| Water response | Absorbs water, slow to dry | Repels water, quick to dry |
| End of life | Biodegradable | Recyclable, not biodegradable |
| Microplastics | None | Sheds in the wash |
Why TURTLEGROOVE chose organic cotton
The most sustainable garment is the one you don't have to replace. For everyday apparel worn against the skin, organic cotton wins on comfort, breathability, and end-of-life impact — so every TURTLEGROOVE piece is made from GOTS-certified organic cotton fibre, embroidered (never printed) and manufactured in Canada to last 200+ wears. We don't make performance swimwear, so we don't use recycled polyester in our garments — though we do embroider with recycled-polyester thread (GRS- and OEKO-TEX-certified), where its durability genuinely fits.
Explore our embroidered organic cotton collection — sweatshirts and t-shirts — or see how and where it's made.
Frequently asked questions
Is organic cotton or recycled polyester more sustainable?
Neither is universally better — it depends on use. Organic cotton uses less water, is biodegradable, and sheds no microplastics, making it greener for everyday clothing. Recycled polyester diverts plastic from landfill and oceans and suits performance wear where stretch and quick-drying matter.
What does GRS (Global Recycled Standard) mean?
GRS is a certification that verifies a material's recycled content and confirms responsible environmental and social practices through the supply chain. On a polyester product, a GRS label means the recycled-content claim has been independently checked.
Does recycled polyester release microplastics?
Yes. Like all synthetics, recycled polyester sheds microplastic fibres when washed; these are too small for most water-treatment systems to capture. A microplastic-catching laundry bag reduces this.
Is organic cotton better for sensitive skin?
Generally yes — it's breathable, hypoallergenic, and free of synthetic chemical residues, which makes it the preferred choice for everyday wear against the skin.
Which lasts longer — organic cotton or recycled polyester?
Recycled polyester holds its shape well in demanding conditions; well-made organic cotton, cared for properly, lasts for years of everyday wear. Longevity also depends on construction — embroidered, well-sewn garments outlast cheaply finished ones whatever the fibre.
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