Polyester is the workhorse of the modern wardrobe. It is durable, lightweight, and quick to shrug off wrinkles, which is why it turns up in everything from activewear to bedsheets. Wash it the wrong way, though, and you invite pilling, static cling, and odors that never quite rinse out.
Knowing how to wash polyester really comes down to a few rules about heat, detergent, and drying. Get those right and your synthetics stay fresh and hold their shape for years.
Key Takeaways
- Sort laundry by color and fabric weight; wash polyester separately to avoid snagging.
- Use warm or cold water on a permanent press or synthetic cycle.
- Air drying is best, but you can use a dryer on a low-heat setting.
- Use oxygen bleach rather than chlorine on polyester blends, and skip high heat, which can melt the fibers.
What Is Polyester Typically Used For?
Polyester is used for outerwear, bed sheets, carpets, tents, seatbelts, and filters, because it is strong and cheap to produce. It is typically used for:
- Outerwear and jackets.
- Underwear and lingerie.
- Bed sheets and pillowcases.
- Blankets.
- Carpets and rugs.
- Filters.
- Industrial tape.
- Camping tents.
- Seatbelts.
- Laundry bags.
What Kind of Clothes Are Made From Polyester?
Designers love polyester because it holds its shape and lasts a long time. You will most often find it in performance wear, such as yoga pants, sports bras, and moisture-wicking jerseys, because the fabric is naturally water-resistant and flexible (1).
Beyond the gym, polyester is common in raincoats, winter coats, hiking pants, and swimwear. It is also frequently blended with cotton to make t-shirts, dresses, and socks more durable.
How to Machine Wash Polyester
Machine washing is the easiest way to clean these items, but you need the right settings to prevent wrinkles and static.
What You Need
Gather these supplies before you start:
- Washing machine.
- Dryer or drying rack.
- Heavy-duty laundry detergent.
- Mesh laundry bags (optional).
Step-by-Step Instructions
1. Separate Your Clothing
Sorting is critical for synthetics. Polyester acts like a magnet for lint, so do not wash it with lint-producing fabrics like towels or cotton flannel. Separate your loads into three groups: dark clothes, whites, and bright colors.
2. Pretreat Stains
Synthetic fibers can hold onto oil-based stains. When you notice a stain on your polyester item, dab it with a small amount of heavy-duty laundry detergent. Gently work it into the fibers with your fingers and let it sit for 15 minutes before washing.
Double Check
3. Select the Cycle
Set your washing machine to the “Permanent Press” or “Synthetics” cycle. These cycles use a cooler wash and a slower spin speed to reduce wrinkling. Use cool or warm water; hot water can break down fibers over time.
4. Add Detergent
Add a high-quality detergent to the drum or dispenser. Enzymatic detergents are best for breaking down body oils and sweat trapped in synthetic weaves. Avoid using too much detergent, as it can leave a residue that attracts dirt.
5. Dry
Remove clothes immediately after the cycle ends to prevent wrinkles. You can air dry them on a rack or use your dryer. If you use the dryer, select the permanent press or low-heat setting.
6. Fold or Hang
Polyester is generally wrinkle-resistant, so you can fold knits like t-shirts and store them in drawers. Hang woven items like dress shirts or pants. If you do see wrinkles, a quick iron on medium heat will smooth them out.
How to Hand Wash Polyester
If your tag says “Hand Wash Only,” it is likely a delicate blend or a structured garment that could be damaged by machine agitation.
What You Need
- A sink or basin.
- Gentle detergent.
- Drying rack.
Step-by-Step Instructions
1. Fill a Basin
Fill a clean sink or basin with cool to warm water. Add a teaspoon of gentle detergent and swish the water to create suds.
2. Soak and Swirl
Submerge the garment. Gently swirl it through the sudsy water with your hands. Allow it to soak for about 15 minutes to loosen dirt and oils.
3. Rinse
Drain the soapy water and refill the basin with cool, clean water. Swirl the garment again to rinse. Repeat this step until no suds remain.
4. Remove Water
Drain the sink. Press the garment against the side of the basin to push out excess water. Never wring or twist polyester tightly, as this can warp the shape.
5. Air Dry
Lay the item flat on a clean towel or hang it on a drying rack. Keep it away from direct heat sources like radiators or direct sunlight, which can fade the fabric.
Can I Use Chlorine Bleach on Polyester?
Yes, you can use chlorine bleach on a plain 100% polyester white, but you should never use it on polyester blended with spandex or elastane, even one with only a small amount of stretch fiber, because the bleach breaks down the elastic (2). Chlorine is also a strong oxidizer, so repeated use on any polyester tends to leave it yellowed and brittle over time instead of white.
For colors, blends, and everyday brightening, reach for oxygen bleach instead. It is safe for synthetics and lifts dinginess from both colored and white clothes without attacking the fibers.
Does Polyester Shed Microplastics in the Wash?
Yes, polyester sheds microplastics in the wash, and it is one of the worst fabrics for it. An average load of synthetic clothing weighing 3 pounds sheds hundreds of thousands of tiny plastic microfibers into the wastewater system (3). You cannot stop it entirely, but a few habits cut it down a lot:
- Wash cold and full: Cold water and fuller loads mean less friction between garments, so more fibers stay on the fabric instead of rinsing away.
- Add a catch bag or filter: A microfiber-catching wash bag (like the Guppyfriend) or an external filter fitted to your machine traps a large share of the fibers before they reach the drain.
- Air dry when you can: Skipping the dryer keeps microplastics out of the air and helps the fabric last longer.
Tips for Washing Polyester
Want to keep your gear looking brand new? Here are a few pro tips for handling synthetic fabrics.
- Watch the heat: High temperatures are the enemy. Never use high heat in the washer or dryer. It can melt fibers, cause shrinking, or lock in creases permanently (4).
- Wash gym gear ASAP: Bacteria loves polyester. Wash workout clothes immediately after use so sweat and odors do not set in.
- Skip the fabric softener: If you are washing moisture-wicking activewear, avoid liquid fabric softener. It leaves a waxy coating that blocks its ability to wick sweat.
- Combat static: Polyester is prone to static cling. If you are air drying, static is less of an issue. If using a dryer, use a dryer sheet or dryer balls.
- Turn inside out: Friction causes pilling. Turn garments inside out before washing to protect the visible side of the fabric.
- Revive whites: To brighten dingy white polyester, soak items overnight in a gallon of warm water mixed with 1/2 cup of automatic dishwashing detergent before washing as normal.
- Check labels: Always verify the care label or washing symbols. Blends (like poly-cotton) wash differently than 100% polyester; per Clorox, chlorine bleach is safe only on the 100% version.
FAQs
Wash It the Right Way
Once you know the rules, washing polyester is simple. Keep the heat low, go easy on chlorine bleach with any blend, and stick to cool or warm water with a good enzyme detergent. Air dry whenever you can, and use a catch bag if you want to keep microfibers out of the water. Treat your synthetics gently and they will stay in good shape for years to come.
