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More on fabric care: Fabric care — Everyday laundry, special items, and how to read a care label.

How to Wash Polyester

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Read the care label first, then wash most machine-washable polyester with laundry detergent on a permanent-press or similar cycle for synthetic fibers. Texas A&M AgriLife Extension says to use that permanent-press dryer cycle for man-made fibers such as polyester, nylon, and acrylic, and to take the clothes out as soon as the cycle ends so they wrinkle less. When in doubt, the label on the garment is the rule that matters.

Last updated: November 13, 2026.

Polyester is a manufactured fiber used in everyday shirts, dresses, athletic wear, and many blends with cotton. University of Hawai‘i at Mānoa Cooperative Extension describes it as durable and wrinkle-resistant, and lists detergent, bleach (when the label allows it), machine drying, and a medium iron as typical options — with the important habit of removing garments right after drying. Blends can change those defaults, so a cotton-polyester pair of pants may not take the same heat as a 100 percent polyester shell.

Start with the care label

In the United States, clothing must carry a care label with the manufacturer’s recommended cleaning method. The Federal Trade Commission’s Care Labeling Rule is what requires that label to stay attached and to be accurate. Follow it even when a general polyester guide says something slightly different. If the label says dry-clean only, do not machine-wash the item at home. For a broader look at labels, sorting, and special fabrics, see our fabric care guide.

How to sort and wash polyester

1. Sort by color, soil, and construction

Texas A&M AgriLife Extension advises sorting by color, fiber, texture, construction, and soil. Separate whites from colors, and wash new or brightly dyed items alone the first few times if you are worried about dye transfer. The American Cleaning Institute notes that some bright and fluorescent colors are less colorfast, and that full-strength pretreatment can remove color from unstable dyes. Test a hidden seam before you pretreat a neon or brightly dyed polyester piece.

Turn items inside out if they pill or if the surface is printed. Close zippers and empty pockets. Wash delicate knits, lace, or loosely constructed pieces separately, which is also AgriLife’s guidance for construction and delicates. A mesh bag can help with small or slippery items; it is not a substitute for a gentle cycle when the label calls for one.

2. Choose the cycle and water temperature on the label

Use a regular laundry detergent, in the amount on the detergent label. A permanent-press or easy-care wash cycle is a common match for polyester because it is designed for synthetic fibers, but many everyday polyester items also do fine on a normal cycle if the care label allows it. When the label specifies cold or a gentle cycle, use that instead.

AgriLife notes that detergents work better in water above 65°F, but the garment label still sets the upper limit. Cold or warm water is typical for colored polyester. Hot water is only for items the label clearly allows, and it is more often used on sturdy whites than on a bright or heat-sensitive blend.

3. Pretreat oily or set-in stains before the wash

Polyester can hold onto body oil, sunscreen, and cooking grease. ACI’s laundry-basics page says prewash soil and stain removers are effective in pretreating heavily soiled and stained garments, especially those made from polyester fibers, and that they work well on oil-based stains such as body soils and cooking oils. Apply the remover, or a little liquid detergent, to the spot, test for colorfastness first, and then wash the whole garment. Do not dry it until the stain is gone.

For tomato or pasta sauce, start with a cold flush from the back of the stain; see how to get tomato sauce stains out of clothes. For a wider list of methods, use the stain removal chart.

How to dry and iron polyester

If the care label allows a dryer, University of Hawai‘i Extension lists machine drying as appropriate for polyester and says garments should be removed right after drying. Texas A&M AgriLife makes the same point for man-made fibers: use the permanent-press cycle, and take clothes out as soon as the cycle ends. Leaving them in a heap in a warm drum sets wrinkles.

Use a low or medium heat setting unless the label says otherwise. High heat is the usual risk for shrinkage, melted trims, or a crisp set wrinkle on synthetics, especially in blends. If you want to reduce dryer heat in general, see our tips to keep clothes from shrinking. Air-drying is always an option and is the safer choice for anything the label says not to tumble dry.

If you iron, Hawai‘i Extension lists a medium iron for polyester. Use a lower setting on blends, printed surfaces, or anything with a shiny finish, and iron on the reverse when you can. A short burst of steam, or hanging the item in a steamy bathroom, can relax light wrinkles without a hard press.

Blends, athletic wear, and fabric softener

Wash a blend for the more delicate fiber in it. A cotton-polyester shirt that says “tumble dry low” should not go on high heat just because polyester often tolerates a dryer. Spandex or elastane in athletic wear or stretch pants usually calls for cold water, a gentle cycle, and low heat or line drying — again, only as the label states.

Moisture-wicking polyester in workout clothes is often labeled to skip fabric softener. Softener coats fibers, and appliance makers such as Whirlpool advise against using it on moisture-wicking athletic wear and performance fabrics, because that coating can reduce wicking. The care label, and our fabric softener guide, cover when to use a softener and when to leave it out. Dryer sheets are a related product; wool dryer balls are one alternative on loads where you want less static without a coating.

Can you use bleach on polyester?

Hawai‘i Extension lists bleach as an option for polyester, but the garment label still comes first. The American Cleaning Institute says to read that label before using liquid household bleach, to test a hidden seam, and to remember that chlorine bleach is not for wool or silk and may not be right for some finishes or trims. If chlorine bleach is not recommended, a color-safe oxygen bleach can help with stains and odors on washable fabric and works best in warm-to-hot water. Do not pour powdered bleach onto wet clothes; add it to the wash water first.

Frequently asked questions

Does polyester shrink in the wash or dryer?

Polyester is more heat-stable than many natural fibers, but high dryer heat, a hot wash the label does not allow, or a blend with cotton or rayon can still change the fit. Follow the care label, use a lower dryer setting, and remove items promptly. For practical habits that reduce shrinkage, see 10 tips to keep your clothes from shrinking.

Should I wash polyester in cold or hot water?

Use the temperature on the care label. Cold or warm water is a safe default for colored polyester. Hot water is only when the label allows it. AgriLife notes that detergent works better above 65°F, which is still compatible with a cold or warm setting in many utilities.

Why is my polyester shirt still oily after washing?

Body oil and cooking grease cling to polyester more than they appear to on some cottons. ACI recommends a prewash stain remover on oil-based stains, especially on polyester, then a full wash, and no dryer until the stain is gone. Treat the area again and rewash if it remains.

Can I put 100 percent polyester in the dryer?

Often yes, if the care label allows tumble drying. Hawai‘i Extension lists the dryer as appropriate for polyester and says to take garments out as soon as they are dry. Use a permanent-press or low-to-medium setting rather than high heat, and check trims, prints, and blends first.

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