Start with the claim you want to make

Almost every development brief we receive now has a sustainability line in it. Sometimes it is precise: "GOTS organic cotton, minimum 95 percent". More often it is a single word, "sustainable", and the buyer is hoping the factory will fill in the rest. I would rather we filled it in together, because the fibre choice decides three things at once: what the product feels like, what it costs, and what you are legally allowed to print on the label.

So my first question back is always the same. What do you want to be able to say to your customer? "Made with organic cotton" leads to one set of fibres and one set of paperwork. "Made with recycled materials" leads to a different set. "Natural fibre" leads somewhere else again. Once the claim is clear, the fibre options narrow quickly, and the rest of this guide walks through each of them as we work with them on our own looms and stitching lines. If you want the certification side in more depth, our GOTS vs OEKO-TEX vs GRS explainer covers what each standard actually verifies. This post is about the fibres themselves.

Organic cotton: what it is and what it is not

Organic cotton is cotton grown without synthetic pesticides or fertilisers, from non genetically modified seed, on land that has been managed organically for a qualifying period. The fibre itself is physically identical to conventional cotton of the same staple length. Nobody can tell organic from conventional by touch, and a lab cannot either. The only thing that makes it organic is the chain of custody: transaction certificates that follow the fibre from the ginner to the spinner to us, and then to you.

That is why the paperwork matters more here than for any other fibre in this guide. Two standards carry the claim. GOTS covers the fibre and the whole processing chain, including the dyes and chemicals used in finishing, and requires a minimum organic content for the label grade. OCS covers the organic content only and says nothing about processing. Both are legitimate; they support different claims. We wrote a separate piece on what buyers should verify with GOTS organic cotton, and the short version is: ask for the scope certificate and the transaction certificate for your specific order, not a certificate somebody photographed on a wall.

In product terms, organic cotton behaves exactly like the equivalent conventional cotton. A 200 thread count percale in organic cotton is a 200 thread count percale. The same rules from our bed linen fabric guide apply. Long staple organic cotton is in tighter supply, so book yarn early for high thread count organic sateen.

Better Cotton and the mass balance question

Buyers often put Better Cotton in the same mental box as organic. It is not the same thing, and the difference matters for labelling. Better Cotton is a farm level programme that trains growers to use less water and fewer chemicals and to improve labour conditions. It does not require organic methods. And, critically, it works on a mass balance basis: the cotton is not segregated through the supply chain. The industry buys a volume of Better Cotton and receives credits for it, but the bales that arrive at a specific spinning mill may be a mix.

What this means for you is simple. You can make a claim about supporting the Better Cotton programme, at the brand level, according to its rules. You cannot claim that the cotton in a particular duvet cover is Better Cotton, and you should not describe it as organic. If the story is about the product in the customer's hands, organic is the route. If it is about sourcing at scale across a whole range, Better Cotton is often the practical answer.

Recycled cotton: short fibre, honest limits

Recycled cotton comes from two sources. Pre-consumer waste is cutting room offcuts and spinning waste, clean and known in composition. Post-consumer waste is used garments and textiles, sorted by colour and fibre, which is harder to do well and more valuable when it is done well. Either way, the recycling is mechanical: the fabric is shredded and torn back into loose fibre, then spun again.

Here is the part nobody likes to say out loud. Tearing fabric apart shortens the fibres, and short fibres make a weaker, hairier yarn. Pure recycled cotton yarn is possible but fragile, so in practice recycled cotton is blended, typically with virgin cotton or with recycled polyester for strength. The blend ratio is the number to ask for. The colour is another practical point: sorted waste can be spun without re-dyeing, which saves water and dye, but it limits you to the shades the waste stream provides. Heathered greys, denims and naturals are easy. A clean pastel is not.

Where does recycled cotton work well? In products where a slightly coarser, softer hand is a feature rather than a fault: throws and blankets, woven cushion covers, flatweave rugs and heavier bath mats. Where does it struggle? Fine bed linen, where the pilling and strength loss show up quickly in a domestic wash. We test every recycled blend for tensile strength, seam slippage and pilling before we quote on it, the same tests we describe in our quality control guide, and I would encourage any buyer to insist on seeing those results.

Founder note A buyer once asked us for a 100 percent recycled cotton sateen sheet set. We could have made it. It would have looked right in the sample room and it would have come back after a season of washing looking like something else entirely. We said no and proposed a recycled cotton throw for the same range instead, where the fibre could do its best work. That range is still running. The lesson I took from it is that a sustainable fibre put in the wrong product is not sustainable at all, because a product that fails early is the least sustainable product there is.

Recycled polyester: where it earns its place

Recycled polyester, usually called rPET, is mostly made from post-consumer plastic bottles that are cleaned, chipped, melted and extruded into new filament or staple fibre. Unlike recycled cotton, the fibre that comes out is close in quality to virgin polyester, so it can go into the same constructions with little compromise. It is verified under GRS, which also audits social and chemical practice at each site, or under RCS, which verifies recycled content only.

In home textiles, rPET shows up in more places than buyers expect. The fill in a cushion or a pouffe can be recycled fibre, and it is one of the easiest sustainable swaps on a whole range because it is invisible to the customer and changes nothing about the look. Shower curtains are a natural home for it, since the category is polyester already; we cover fabric choices for those on our bath textiles page. Fleece and sherpa throws, the backing on tufted rugs, and the polyester share of cotton blends can all move to recycled content. Our cushion filling guide goes into the fill options in detail.

The honest caveat is microfibre shedding. Recycled polyester sheds in the wash like virgin polyester does. If your brand story is built around avoiding plastic, rPET is not the answer, and a natural fibre route will serve you better. If your story is about diverting waste and reducing virgin material, it is a strong and well documented option.

Linen, hemp, jute and wool

Some of the most credible sustainability stories in our industry do not involve a recycling plant or a certification at all. They involve plants that grow with little irrigation and animals that grow a new coat every year.

Matching the fibre to the product

Pulling the threads together, this is roughly how we steer buyers when they ask which sustainable route to take for each category:

None of this is fixed, and recycled cotton spinners in particular keep improving. But the logic holds: put the fibre where its weaknesses do not show.

Keeping the claim honest: certificates and labels

Every sustainable fibre carries a claim, and every claim needs evidence that survives a regulator's inspection or a journalist's phone call. In practice that means four things from your manufacturer:

  1. A valid scope certificate showing the factory is certified to the relevant standard, with your product category in scope.
  2. A transaction certificate for each shipment, naming the buyer, the product, the quantity and the certified content.
  3. The blend ratio and fibre composition stated exactly on the care label, using legal fibre names and true percentages.
  4. Test reports from an accredited lab for the physical properties that matter, particularly on recycled blends.

Green claims rules in the EU and UK have tightened, and general words like "eco" or "green" without substantiation are now a real liability for the brand that prints them. The safest label wording is specific and boring: "Made with 60 percent GOTS certified organic cotton and 40 percent GRS certified recycled polyester" says everything and risks nothing. You can read about label placement and the rest of the packaging brief in our packaging and labelling guide. On our side, the certifications we hold and the practices behind them are set out on the sustainability page, and the water and effluent side of the operation is described alongside the rest of our infrastructure.

Frequently asked questions

Is recycled cotton as strong as virgin cotton?

No. Mechanical recycling tears fabric back into fibre, and the fibres come out shorter than they went in. Shorter fibre spins into a weaker, hairier yarn. That is why recycled cotton is nearly always blended with virgin cotton or another fibre rather than used alone, and why it suits heavier, more forgiving constructions such as throws, rugs and cushion covers better than fine bed linen. Ask your manufacturer for the blend ratio and test the fabric for strength and pilling before you commit.

What is the difference between organic cotton and BCI cotton?

Organic cotton is grown without synthetic pesticides or fertilisers and without genetically modified seed, and under GOTS or OCS the fibre is physically tracked from farm to finished product, so the cotton in your bedding is the certified cotton. Better Cotton is a farm improvement programme that works on a mass balance basis: the volume of Better Cotton bought by the supply chain is credited, but the cotton in any specific product is not guaranteed to be from a Better Cotton farm. Both are legitimate. They simply support different claims.

Can a product be certified as recycled and organic at the same time?

Yes, in a blend. A throw made from organic cotton and recycled polyester, for example, can carry a GOTS or OCS claim for the organic share and a GRS or RCS claim for the recycled share, provided both fibres are certified and the blend meets each standard's minimum content rule. The label must state each percentage accurately. What you cannot do is describe the whole product as organic or as recycled when only part of it is.

Do sustainable fibres cost more than conventional ones?

Usually, but not always in the way buyers expect. Certified organic cotton carries a premium at fibre stage because of yield and certification costs. Recycled polyester can be close to virgin polyester depending on the market. Recycled cotton is often cheaper per kilo than virgin cotton but needs blending and extra process control. Linen and jute are natural fibres with their own price cycles. Ask for a costed comparison on the same construction so you can see the real difference on your product rather than a general figure.

Closing thought

The fibre is only the beginning of a sustainable product. Dyeing, finishing, water treatment, packaging and, above all, how long the product lasts in the customer's home all count for as much. But the fibre is where the claim starts, and it is the decision that is hardest to change once the yarn is booked. Decide what you want to say, choose the fibre that lets you say it truthfully, and then put it in the product where it will perform.

If you are building a range and are unsure which route fits, send us your brief. We will come back with two or three fibre options for each product, the paperwork each one carries, and a frank view of where each will and will not hold up. We keep low and flexible MOQs on certified fibres too, so a first sustainable capsule does not have to be a large one.