Do polyester blankets shed microplastics while sleeping?
Use caution with polyester fleece blankets. Direct sleep exposure has not been measured well, but textile fibers and microplastics are found in indoor air and dust, and polyester fleece releases fibers during drying.
What's actually in it
Polyester is plastic fiber. A polyester fleece blanket can shed tiny fibers as it rubs, washes, dries, and wears down. Those fibers can collect in indoor dust, on floors, and in laundry lint.
The honest answer is this: researchers have not clearly measured how much one polyester blanket releases while a person sleeps under it. But indoor dust studies do show that homes contain textile fibers and microplastics, and children can take in more dust because they spend time on floors and put hands in their mouths.
What the research says
A 2017 study in Environmental Pollution measured fibers in indoor air and settled dust. Indoor air had higher fiber levels than outdoor air, and about 33% of indoor fibers contained petrochemical materials.
A 2022 international house-dust study found microplastics in dust from homes across 29 countries. Synthetic polymers were common, and infants had the highest modeled exposure through dust ingestion and inhalation.
A 2020 dryer study used a blue polyester fleece blanket and found that domestic drying released airborne microplastic fibers. That does not measure sleep exposure, but it confirms that polyester fleece can shed fibers during normal home care.
What to do at home
If a polyester blanket smells strong, pills heavily, or leaves lint everywhere, replace it when you can. Choose cotton, bamboo, wool, or alpaca blankets for beds, sofas, and kids' rooms. Wash full lint traps, vacuum dust often, and avoid drying synthetic fleece on high heat.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| A first overview of textile fibers, including microplastics, in indoor and outdoor environments. | Environ Pollut | 2017 |
| International quantification of microplastics in indoor dust: prevalence, exposure and risk assessment. | Environ Pollut | 2022 |
| Airborne emissions of microplastic fibres from domestic laundry dryers. | Sci Total Environ | 2020 |
What to use instead
When replacing a worn polyester throw or bed blanket, choose cotton, bamboo, wool, or alpaca options instead.
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