Do microplastic fibers from polyester pajamas get inhaled while sleeping?

What's actually in it

Polyester is a synthetic plastic. When you wear it, the fabric is not a solid, unchanging surface. It is a collection of tiny plastic threads that break down over time. These threads shed as microplastics (tiny plastic pieces smaller than 5 millimeters) into your environment.

While we often think of these fibers being released in the laundry, they also shed through simple friction. Every time you move in bed, your pajamas rub against your skin and the sheets. This friction causes the plastic fibers to break off and enter the air around you.

What the research says

Peer-reviewed research confirms that synthetic textiles are a major source of microplastic pollution. A 2026 study in ACS Environ Au examined how different textile coatings affect the release of these fibers. The study found that the way fabrics are made and coated directly changes how many plastic fibers they shed into the environment.

Furthermore, the spread of these plastics is a growing concern. A 2026 study in J Agric Food Chem highlights that microplastics are now found throughout our food chain and environment. Because these fibers are lightweight, they easily become airborne. When you wear polyester to bed, you are surrounded by a source of plastic fibers that can be disturbed by your movement throughout the night.