How to Wash Polyester

By Zach Pozniak, VP of Operations at Jeeves of Belgravia New York and fourth-generation dry cleaner · @jeeves_ny

How to wash polyester

Polyester is durable, easy to care for, and usually machine washable, but it performs best when you wash it the right way. The main goal is to remove body oil, sweat, and odor without overheating the fabric or trapping residue in the fibers.

Quick method

1. Check the care label. Most polyester can go in the washer, but special finishes, linings, or blends may need gentler handling.
2. Pretreat visible stains. For sweat, dirt, grass, or food, apply an enzymatic stain remover or a mix of water, mild soap, and a little white vinegar. Let it sit 10 to 15 minutes.
3. Wash with a high-quality detergent. Use the permanent press cycle or a gentle cycle with cool to warm water.
4. Add a booster if needed. For stubborn odor, use baking soda or a laundry booster designed to cut oil and buildup.
5. Dry carefully. Air-dry when you can, or use low heat. Polyester dries quickly, so avoid overcooking it in the dryer.

Why polyester needs a little extra care

Polyester is hydrophobic, which means it does not hold water the way cotton does. That helps it dry fast, but it also means it tends to hold onto body oil, sweat residue, and odor-causing bacteria. If you wash it lightly or use too much fabric softener, that buildup can stay behind and make the garment smell worse over time.

Best washing settings

Water temperature

Cool to warm water is usually the safest choice for everyday polyester. If odor is a major issue, a warmer wash can help, as long as the care label allows it.

Cycle

Use permanent press for most polyester clothing. It helps reduce wrinkling and is gentler on graphics, elastic, and performance fabrics.

Detergent and additives

Use a detergent made for odor control or one that cleans well in your water type. For stubborn gym wear, baking soda or a laundry sanitizer can help. Skip fabric softener, which can coat synthetic fibers and trap oil and funk.

Drying polyester

Polyester usually dries much faster than cotton, so check it early. If you tumble dry, use low heat and remove items as soon as they are dry to prevent wrinkling, cracking on printed graphics, and damage to elastic. Air-drying is often the safest option for activewear and anything with logos or stretch.

Common mistakes to avoid

• Using too much fabric softener: it can lock in odor and residue.
• Overdrying: heat can damage stretch, graphics, and finishes.
• Waiting too long to wash sweaty clothes: body oils set in and become harder to remove.
• Skipping pretreatment: stains on polyester often need help before the wash.

When to get professional help

If a polyester garment has a delicate lining, bonded construction, heavy odor buildup, or a stain that has already been heat-set, professional cleaning may be the safest option. This is especially true for tailored pieces, uniforms, and items with specialty trims or prints.