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Do clothes shed microplastics? Yes, here is how much

Yes

Every time you wash a synthetic garment, it sheds thousands to hundreds of thousands of plastic microfibres. These end up in rivers, oceans, drinking water, and human tissue. Here is what the peer-reviewed research measures, and what actually reduces it.

In this article

How much clothes shed, by fabric

The landmark study (Napper and Thompson, 2016) measured a single 6 kg wash load: acrylic shed about 728,000 fibres, polyester about 496,000, and a polyester-cotton blend about 138,000. Construction matters as much as fibre: fleece sheds far more than a tight knit of the same polymer.

Acrylic sheds about 728,000 microfibres per wash, polyester about 496,000, and a poly-cotton blend about 138,000 (Napper and Thompson, 2016).

Where the fibres end up

Washing synthetic textiles is responsible for around 35 percent of the primary microplastics entering the ocean (IUCN, 2017). From there they enter the food chain. Researchers have now found microplastics, with PET (polyester) the most common polymer, in human blood (77 percent of donors), lung tissue, and placenta.

What actually reduces shedding

The evidence points to a few effective steps, with measured effect sizes (Lant et al., 2020): wash cold and on shorter cycles (around 30 percent less shedding), run full loads (around 50 percent less), and use a high-efficiency machine. A Guppyfriend-style wash bag captures around 39 percent of polyester fibres. Fabric softener makes no measurable difference.

The recycled-polyester catch

Recycled polyester lowers carbon emissions, but it does not cut microplastic shedding, and some studies show it sheds more. So recycled content is not a shedding solution.

The simplest fix: buy fewer synthetics

Natural fibres (cotton, linen, wool, hemp) and lyocell do not shed plastic. ClothTrace estimates a garment's shedding load from its fibre mix the moment you scan, so you can weight that into a purchase.

See what your clothes are really made of

Scan any care label. ClothTrace reads the real fibre, decodes the wash symbols, and flags what it puts against your skin. Free to scan.

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Frequently asked

Do all clothes shed microplastics?

Only synthetic fabrics shed plastic microfibres: polyester, acrylic, nylon, and elastane. Natural fibres like cotton, wool and linen shed lint that is biodegradable, not plastic.

Which fabric sheds the most microplastics?

Acrylic sheds the most in controlled tests, followed by polyester. Fleece and other loose constructions shed more than tight weaves of the same fibre.

How do I reduce microplastics from laundry?

Wash cold, run full loads, use a high-efficiency machine, and add a microfibre-catching wash bag. Buying fewer synthetic garments is the most effective step of all.