How to reduce microplastics from clothes: 6 steps that actually work
Every wash of a synthetic garment releases thousands of plastic microfibres into waterways. You cannot stop it entirely, but the research points to a handful of steps that cut it sharply, with measured effect sizes. Here they are, from most to least effective.
1. Buy fewer synthetics (the biggest lever)
Nothing reduces microfibre shedding more than owning fewer plastic-based clothes. Natural fibres (cotton, linen, wool, hemp) and lyocell shed no plastic at all. This is the single highest-impact step, because it removes the source rather than managing it. Checking the fibre mix before you buy is where most of the change happens.
2. Wash full loads, cold and short
How you wash matters as much as how often. A full load reduces fibre release by roughly half compared with a small load, because less fabric rubs against fabric. Cold, shorter cycles cut shedding by around 30 percent versus hot, long ones (Lant et al., 2020). This is free and saves energy too.
3. Use a microfibre wash bag
A Guppyfriend-style wash bag holds synthetic garments and captures the fibres they shed. One study measured about a 39 percent reduction in polyester fibres released (Lant et al., 2020). Empty the captured lint into the bin, not the sink.
4. Add a washing-machine filter
An external microfibre filter fitted to the machine's outflow captures fibres before they reach the drain. France now requires microfibre filters on new domestic washing machines, a sign of where regulation is heading. Filters capture a large share of fibres across all the synthetics you wash, not just one garment.
5. Air-dry instead of tumble drying
Tumble dryers shed microfibres too, venting them into the air rather than water. Line drying or flat drying avoids that second release entirely, and is gentler on the fabric, so it lasts longer and sheds less over its life.
6. Know that recycled polyester is not a fix
Recycled polyester lowers the carbon footprint of making the fibre, but it does not reduce microplastic shedding, and some studies show it sheds as much or more. So recycled content is a climate improvement, not a shedding solution. The shedding answer is fewer synthetics and the wash habits above. ClothTrace estimates a garment's shedding load from its fibre mix the moment you scan, so you can weigh it before buying.
See what your clothes are really made of
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Frequently asked
What is the best way to reduce microplastics from laundry?
Owning fewer synthetic clothes is the most effective step, because natural fibres shed no plastic. After that: wash full loads cold and short, use a microfibre wash bag, fit a machine filter, and air-dry.
Do washing machine filters work for microplastics?
Yes. An external filter on the machine's outflow captures a large share of fibres before they reach the drain, across every synthetic load. France now mandates filters on new domestic machines.
Does fabric softener reduce microfibre shedding?
No. Controlled testing found fabric softener makes no measurable difference to shedding. Washing cold in full loads and using a filter bag do.
- Sources
- Napper & Thompson (2016), Marine Pollution Bulletin.
- Lant et al. (2020), PLoS ONE, washing conditions and wash-bag capture.
- Boucher & Friot (2017), IUCN, primary microplastics from textiles.