01How polyester is made
Polyester starts as two petrochemicals, purified terephthalic acid (PTA) and monoethylene glycol (MEG), which react to form PET. The molten polymer is pushed through spinnerets (melt spinning) into long filaments that are cooled, drawn to align the molecules and add strength, and wound.
From there it goes one of two ways. Filament yarn keeps the continuous strands, often textured (crimped) to add bulk and stretch. Staple fiber is cut into short lengths and spun like cotton, often blended with it. The shape and size of each filament can be engineered: round, trilobal for shine, channeled for wicking, or very fine for microfiber.
Recycled polyester is the same polymer made from used bottles or textile waste, melted or chemically broken down and re-spun.
02Performance knits, microfiber and dye sublimation
Most "performance" fabric is polyester knit, often with spandex. Because polyester absorbs very little water, sweat moves along and through the fabric and evaporates instead of soaking in. Wicking finishes and channeled yarns help that along.
Microfiber is polyester (or nylon) with filaments finer than about 1 denier. It feels soft and smooth, drapes well, and is used for cleaning cloths, sheets, linings and peach-finished activewear.
Polyester is dyed with disperse dyes at high temperature, and that is what makes dye sublimation work. The design is printed on transfer paper, then heat pressed so the dye turns to gas and bonds into the fiber. The result is full-color, all-over prints that do not crack or peel, which is why jerseys and team kits are almost always polyester. Sublimation needs high polyester content and works best on white or light fabric.
03Pros and cons
- Cheap, with huge supply and low fabric MOQs from stock
- Dries fast and wicks well in performance knits
- Holds shape, resists wrinkles and barely shrinks
- Strong, durable and colorfast
- Takes dye sublimation for full-color all-over prints
- Holds body odor more than natural fibers unless treated
- Absorbs little moisture, so it can feel clammy at rest
- Pills, and the pills stay attached
- Melts under high heat and attracts oily stains
- Made from fossil fuels and sheds microfibers in the wash
04Typical uses and price
- Activewear: tees, shorts, leggings (with spandex)
- Performance golf polos and team jerseys
- Polar fleece jackets and blankets
- Linings, outerwear shells and bags
- Sublimated sportswear and promotional items
- Microfiber sheets and cleaning cloths
- Blends with cotton for basics (CVC, 50/50)
Price tier: Budget. Polyester is the cheapest mainstream apparel fiber. Specialty performance yarns, branded fabrics and recycled versions cost more, but polyester rarely leaves the budget to mid range.
05How to spec it with a factory
"Polyester" covers everything from a cheap promo tee to a high-end golf polo. Spell out the yarn and finishes in the tech pack.
| No. | Field | What to write |
|---|---|---|
| 01 | Fabric composition | Exact percentages, e.g. 100% polyester, or 88% polyester 12% spandex |
| 02 | Virgin or recycled | State it; if recycled, ask for GRS or RCS certificates |
| 03 | Yarn | Denier and filament count (e.g. 75D/72F), filament or spun, textured or not |
| 04 | Construction | Jersey, interlock, pique, mesh, fleece, or woven type |
| 05 | Weight | GSM after finishing, with a tolerance |
| 06 | Finishes | Wicking, anti-odor, UV, peach or brushed, anti-pill, DWR for wovens |
| 07 | Sheen | Full dull, semi-dull or bright yarn; approve on a swatch |
| 08 | Print method | Sublimation, screen or heat transfer; sublimation needs high polyester content |
Certifications and marks
- OEKO-TEX Standard 100
- Tests the finished fabric for harmful substances, including dyes and finishes.
- bluesign
- Covers chemicals and processes at the mill. Common for performance and outdoor polyester.
- GRS or RCS
- Only for recycled polyester claims.
From the factory floor
- Specify sheen. Bright yarn reads cheap on a polo; semi-dull or full dull looks more premium.
- Ask how wicking and anti-odor are achieved and how many washes they last. Some topical finishes wash out quickly.
- Dark polyester dyed at high temperature can bleed onto sublimated or white prints; test print on the dyed fabric.
- Watch for spandex percentage drift. Factories sometimes reduce spandex to save cost; test stretch and recovery on bulk.
06Polyester vs cotton
| Polyester | Cotton | |
|---|---|---|
| Source | Synthetic, petroleum based | Natural plant fiber |
| Moisture | Absorbs little, dries fast | Absorbs a lot, dries slowly |
| Feel | Smooth, can feel synthetic | Soft, dry, natural |
| Shrinkage | Minimal | Can shrink if not pre-shrunk |
| Odor | Holds odor | Holds less odor |
| Printing | Sublimation, screen | Screen, DTG, garment dye |
| Cost | Budget | Budget to premium |
Cotton feels better and breathes for everyday wear. Polyester wins for sport, outdoor and anything that has to dry fast or hold an all-over print. Blends like 60/40 or 50/50 jersey sit in between.
07Polyester vs nylon
Nylon is softer, stretchier and more abrasion resistant, which is why it is used in leggings, swimwear and tough bags. Polyester is cheaper, dries faster, holds up better in sunlight and is easier to dye with sublimation. Nylon generally costs more.
08FAQ
Q01Is polyester a plastic?
Yes. Polyester fiber is made from PET, the same family of plastic used in drink bottles.
Q02Is polyester breathable?
The fiber absorbs very little water, but knit structure and wicking finishes let air and sweat move through. Performance polyester feels fine in sport; plain polyester can feel clammy at rest.
Q03Does polyester shrink?
Very little in normal washing. High heat can distort or melt it, so use low dryer and iron settings.
Q04Why does polyester smell?
Odor-causing bacteria and body oils bind to polyester fibers more than to natural fibers. Anti-odor finishes and blends with merino or cotton help.
Q05Can you sublimate on cotton?
Not well. Sublimation dyes bond to polyester, so you need high polyester content, ideally 100%, for bright, permanent prints.