What Is Polyester Fabric?
Polyester fabric is made from polyester fibre, a synthetic polymer. In clothing, the polymer is almost always polyethylene terephthalate, usually shortened to PET, produced from petrochemical raw materials. The same polymer is used for drinks bottles, which is why recycled bottles can be turned back into fibre. Polyester is not one fabric but a fibre family: it can be woven, knitted or brushed, and it can be made to feel slick and technical, soft and matte, or fluffy and warm.
Its dominance comes from a handful of practical strengths. It is strong, it resists stretching and abrasion, it dries quickly because it absorbs very little water, and it holds dye and shape well. Its weaknesses are just as well known: it can feel less breathable than natural fibres, it builds static, it can hold odour, and in staple form it pills.
The next sections explain how those forms and properties translate into real garments, so that you can write a specification a mill or factory can quote against.
Filament, Staple and Microfibre: How Polyester Fibre Is Made
Polyester is manufactured by melting the polymer and pushing it through very fine nozzles. The resulting filaments can be left as long continuous strands, called filament yarn, or cut into short lengths to make staple fibre. The choice defines the fabric. Filament yarn gives smooth, lustrous, strong cloth such as linings, taffeta and satin. Staple fibre is spun like cotton and gives a softer, more matte yarn that can be blended with cotton.
Two further terms appear in specifications. Texturised yarn has been crimped or bulked so the filaments trap air, giving a warmer, softer, more stretchy fabric, and it is common in knits. Microfibre refers to filaments that are extremely fine, which allows a denser, softer and more drapey fabric than ordinary polyester. Fineness is expressed in denier or decitex, and the lower the number, the finer the filament.
Polyester forms and what they are used for
| Form | What it is | Typical result | Common uses |
|---|---|---|---|
| Filament yarn | Continuous strands, smooth | Lustrous, slippery, strong woven or knit | Linings, taffeta, satin, shell fabrics |
| Staple fibre | Short cut fibres spun into yarn | Matte, cotton-like feel, can be blended | Poly-cotton jersey, fleece, shirting |
| Texturised yarn | Filament crimped for bulk | Soft, warm, some natural stretch | Knits, fleece, interlock, sportswear |
| Microfibre | Very fine filament | Dense, soft, drapey | Peach skin, soft shells, fine knits |
General descriptions of how the forms are usually used. Individual fabrics vary with yarn count, construction and finishing.
Satin and mesh-type fabrics are mostly filament polyester, and the satin fabric guide explains why that form behaves differently to a spun poly-cotton jersey.
Key Properties of Polyester Fabric
Understanding the core properties of polyester fabric helps predict how a garment will look and wear. The ratings below are indicative and compare polyester with cotton and a typical blend. They are intended to guide a conversation, not replace testing.
Polyester fabric against cotton and a 50/50 blend
1 dot = low, 5 dots = high
| Polyester | Cotton | 50/50 poly-cotton | |
|---|---|---|---|
| Strength and abrasion | ●●●●● | ●●●●● | ●●●●● |
| Quick drying | ●●●●● | ●●●●● | ●●●●● |
| Shape and wrinkle recovery | ●●●●● | ●●●●● | ●●●●● |
| Breathability | ●●●●● | ●●●●● | ●●●●● |
| Static resistance | ●●●●● | ●●●●● | ●●●●● |
| Pilling resistance, spun fabrics | ●●●●● | ●●●●● | ●●●●● |
Indicative ratings based on typical fabric/process characteristics, not laboratory results.
Polyester has a thermoplastic character, which means heat can set a shape but also damage the fabric. Pressing temperatures need to be controlled, and heat setting is used in manufacture to stabilise a fabric before cutting. Staple polyester pills because its strong fibres hold the loose ends in place, which we explain in the guide to fabric pilling.
Common Polyester Fabric Constructions and Typical Weights
Polyester appears in almost every fabric construction. Weight bands help to narrow the choice, and the figures below are typical rather than fixed, because yarn and finishing change the result.
Typical weights of polyester fabrics
Grams per square metre
Typical ranges only. They vary by product, fibre blend and factory, so always confirm against a sample.
Jersey and interlock are used for tees, sports tops and loungewear, fleece for warmth, and light wovens for linings and shells. For the fleece side in particular, see our fleece fabric guide, and the polar fleece vs sherpa comparison for pile fabrics.
Polyester Blends and Typical Ratios
Blending lets a mill balance polyester's strength and stability against the comfort of other fibres. Adding polyester to cotton cuts shrinkage and wrinkling and speeds drying, while adding cotton to polyester makes it more breathable and softer on the skin. Rayon, wool and elastane are also blended with polyester for drape, warmth and stretch.
Common polyester blends and typical use
| Blend | Character | Typical use |
|---|---|---|
| Poly-cotton 65/35 | Polyester-led; durable, stable, easy care | Workwear, uniforms, shirting |
| Cotton-polyester 60/40 | Cotton-led; softer, stable | Tees, polos, mid-weight basics |
| Cotton-polyester 80/20 | Soft, with improved shape retention | Fleece hoodies, sweatshirts, joggers |
| Polyester-elastane | Smooth stretch, strong | Leggings, sports tops |
| Polyester-viscose | Drape with shape retention | Skirts, trousers, uniform bottoms |
Typical ratios used across the industry. Ratios are a choice for each product, not a rule.
Blends do change how a garment is decorated and recycled. A mixed fibre garment is harder to recycle than a single fibre one, and printing on blends needs care, which we cover in the sections below.
Dyeing and Printing Polyester Fabric
Polyester will not accept the dyes used for cotton. It is dyed with disperse dyes, which enter the fibre at high temperature and are very durable once fixed. In a blend with cotton the two fibres need different dyes, so exact colour matching between batches takes more control, and heathered effects are possible when one fibre is left undyed or dyed differently.
For printing, dye sublimation is the best-known method for polyester. The dye turns to gas and bonds with the fibre, producing an all-over print that does not crack or add thickness. It works best on white or light polyester, and our sublimation printing guide explains the limits. Screen printing and heat transfers also work, but on polyester and blends a problem called dye migration can occur, where dye from the fabric moves into the ink and changes its colour. Ask the printer to test the exact fabric.
Dye migration can show up days after printing, so a quick sample is not always enough. Ask the printer to test a pre-heated and aged swatch of the real fabric, and approve a decorated sample before bulk.
Recycled Polyester and rPET: What to Check
Recycled polyester, often written rPET, is polyester made from recycled material. Most of it comes from post-consumer plastic bottles, and a smaller share comes from textile waste or manufacturing offcuts. It uses the same chemistry as virgin polyester, so the fabric can look and behave much the same.
Treat recycled polyester claims with care. A recycled content claim should be backed by documentation, and the Global Recycled Standard (GRS) is one well-known verification scheme that you can ask about. It is not automatically the lower-impact option, because the garment still sheds microfibres, still needs a working life, and still faces the same end-of-life problem as any polyester. Recycled bottle polyester also removes material from the bottle recycling stream, which is a point some brands weigh. Our sustainable fabrics guide discusses how to make claims responsibly.
Questions to ask before accepting a recycled polyester claim
- Which part of the fabric is recycled: the whole yarn, one yarn in a blend, or the lining only?
- Is the recycled content verified by a scheme such as GRS, and can the certificate be seen?
- Where does the recycled material originate: bottles, textile waste or offcuts?
- Does the supplier hold a transaction certificate that matches the order?
- Does your marketing wording match what the documents support?
Wording matters. Do not use a broad claim that the documents do not cover.
Microfibre shedding is a real concern for all polyester, recycled or not. Washing releases tiny fibres, so lower-shedding constructions, filtered washing and longer garment life are all sensible considerations.
Cutting, Sewing and Care of Polyester Fabric
Polyester behaves differently from cotton on the cutting table and in the sewing room. Filament fabrics are slippery and need careful lay-up and sharp cutting, while knits can curl at the edge. Sewing needs fine, sharp needles to avoid snagging, and thread tension should be set carefully to prevent puckering on lightweight wovens. Seam slippage, where the weave pulls away from the stitching, is more common in smooth filament cloth, so seam allowances may need to be wider.
Care is easier than for most natural fibres. Polyester generally tolerates machine washing, dries fast, and rarely shrinks in normal laundering. High heat is the main enemy, because it can leave shine marks, set creases or distort a fabric. Follow the fabric supplier's care recommendation and test on a sample. For poly-cotton, remember that the cotton component still needs shrinkage control.
From polyester fibre to garment
- 1PolymerPET is produced, then melted and extruded into filaments.
- 2YarnFilaments are used as they are, textured, or cut and spun as staple.
- 3FabricYarn is woven or knitted, and then brushed or finished if required.
- 4Heat settingThe fabric is stabilised so that it keeps its width and shape.
- 5Dye and finishDisperse dye is applied, plus any wicking, soft or anti-pill treatment.
- 6Cut and sewPanels are cut with attention to slippage and made into the garment.
A simplified route. Each mill has its own sequence.
How to Specify Polyester Fabric and What to Test
A specification for polyester fabric should be precise enough that two mills would quote the same product. Write down the fibre content, whether the yarn is filament, staple or texturised, the fabric construction, the weight in GSM, the width, the finish and the handfeel you expect. For fine filament yarn, include the denier or decitex. If you need recycled content, state what is required and the certification you expect.
What to put in a polyester fabric specification
| Item | Why it matters | Example wording |
|---|---|---|
| Fibre content | Sets handfeel, care and labelling | 100 per cent polyester, or the exact blend ratio |
| Yarn type | Filament, staple or texturised changes character | Texturised filament, fine denier |
| Construction | Defines drape, stretch and strength | Single jersey, interlock, plain weave, fleece |
| Weight | Allows fair quote comparison | GSM target with a tolerance |
| Finish | Controls hand and performance | Brushed, peach, wicking, anti-pill |
| Tests | Proves performance | Pilling, colour fastness, dimensional change |
A general template. Add your own requirements for width, shade and certification.
For tests, ask for pilling resistance, colour fastness to washing, rubbing and perspiration, and dimensional change after washing, and agree the test method with the factory. Our garment testing guide explains the common tests. On a swatch, check handfeel, shine, static, stretch recovery and how the cut edge behaves.
Polyester Fabric Within Ruhrose's Range
Ruhrose develops hoodies, jersey, denim and woven casualwear for UK buyers, with production in Bangladesh. Poly-cotton fleece and jersey fall inside that range, and we discuss blend ratios and weights during sampling. Technical performance polyester, such as engineered sportswear fabrics, is outside our core, and a specialist performance-fabric supplier is the right route for that. Our nylon vs polyester guide helps with the next step in fibre choice.