Polyester is the workhorse of the modern wardrobe. It is durable, lightweight, and resists wrinkles, making it a favorite for everything from activewear to upholstery. However, washing it incorrectly can lead to pilling, static cling, and lingering odors.
If you are wondering how to keep your synthetic fabrics looking fresh without ruining the fibers, you are in the right place. Let’s break down exactly how to wash polyester properly.
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.
- Avoid chlorine bleach and high heat, as these can damage or melt synthetic fibers.
What Is Polyester Typically Used For?
Because it is strong and versatile, you will find polyester in a wide range of household items and garments. 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?
No, you should never use chlorine bleach on polyester. Chlorine eats away at the synthetic coating and can strip the outer layer of the fiber, leading to yellowing and damage (2).
Instead, use oxygen bleach. It is safe for synthetics and effective at brightening both colored and white clothes without destroying the fabric integrity.
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 (3).
- 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 the fabric’s 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.
FAQs
Can You Put Polyester in the Dryer?
Yes, but you must use low heat. High heat can shrink or even melt the plastic fibers. Use the permanent press or synthetic drying cycle, and remove items while they are still slightly damp to prevent wrinkles.
Does Polyester Shrink in a Hot Wash?
Yes, it is possible for polyester to shrink in hot water. Since polyester is a type of plastic, high temperatures can cause the fibers to constrict and distort the shape of the garment.
How Do You Wash a Polyester Filling?
Items with polyester filling (like pillows) are best washed by hand to prevent clumping.
- Fill the tub: Use cool water and a cup of gentle detergent.
- Submerge: Press the items down and massage them to release dirt.
- Rinse: Refill with clean water and squeeze the items until the soap is gone.
- Remove water: Press against the side of the tub; do not wring.
- Dry: Dry on a flat surface or hang on a clothesline on a sunny day. Massage the filling occasionally to fluff it back up.
Why Do Polyester Clothes Smell After Washing?
Polyester is lipophilic, meaning it absorbs oils (and the bacteria that feed on them) easily. Standard detergents sometimes struggle to penetrate the plastic fibers to remove these oils (4). Soaking clothes in a cup of distilled white vinegar diluted in water can help kill bacteria and remove odors.
How Do You Remove Stains From a Polyester Shirt With Dish Soap?
Dish soap is excellent for fighting grease on polyester.
- Dampen the stained area with warm water.
- Apply a drop of clear dish soap and rub it in with your fingers.
- Let it sit for a few minutes, then rinse or toss it immediately into the wash cycle.
- Air dry to ensure the stain is fully gone.
Why Do My Polyester Shirts Stain After Washing?
If stains appear after washing, it is usually because the shirt absorbed dye from other clothes, or an oil stain wasn’t fully removed before drying. Always separate colors and treat grease spots before the wash. If a stain remains, take the item to a dry cleaner.
Does Polyester Fade When Washed?
Generally, no. Polyester is colorfast and holds dye very well. If your item is fading, it may be due to using chlorine bleach or drying the item in intense, direct sunlight for prolonged periods.
How Do I Stop Static Cling on Polyester?
Synthetic fabrics are prone to static electricity. To stop it, add a cup of distilled white vinegar to the rinse cycle of your washing machine. Alternatively, you can use a dryer sheet or wool dryer balls if you are machine drying the items.
Wash It the Right Way
Once you know the rules, washing polyester is simple. The key is to avoid high heat and harsh chemicals like chlorine bleach. Stick to cool or warm water, use a good enzyme-based detergent, and air dry whenever possible. Treat your synthetics gently, and they will stay durable and vibrant for years to come.
