When we think about sources of plastic pollution, most of us picture water bottles, shopping bags, or food packaging. But one of the largest sources of plastic pollution may already be hanging in our closets: synthetic fibers.
Today, synthetic fibers, such as acrylic, nylon, polyester, and spandex, account for roughly 69% of global textile fiber production, with polyester alone making up 59%, according to Textile Exchange’s 2025 Materials Market Report. These materials are derived from fossil fuels and are, quite literally, types of plastic. While they may look and feel harmless, they come with significant environmental and health concerns that many consumers are only beginning to understand.
We think it’s time to ask: what are our clothes really made of, and what happens when we wear, wash, and dispose of them?
The Hidden Problem With Synthetic Textiles
Shedding at the Source
Every time synthetic clothing is washed, it sheds tiny threadlike plastic particles known as microfibers. These microscopic fibers are too small to be reliably captured by many wastewater treatment systems and are commonly discharged into rivers, lakes, oceans, and other bodies of water.
Peer-reviewed research backs this up. A widely cited 2016 study in Marine Pollution Bulletin found that an average 6-kilogram (13.2 pounds) wash load of synthetic fabrics can release over 700,000 microfibers in a single cycle. A 2021 study in PLOS ONE measured a similarly wide range, from roughly 8,800 to more than 6.8 million microfibers per wash, depending on fabric type and construction, with fleece and mechanically-treated polyester shedding the most.
Unlike organic matter, plastic doesn’t biodegrade. Instead, it fragments into smaller and smaller pieces that persist in the environment. Over time, these fibers accumulate in the environment and our bodies, and have been detected in drinking water, food, human brains and blood, soils, and much more. Researchers at Vrije Universiteit Amsterdam found measurable plastic particles in the blood of 77% of the 22 donors tested in a 2022 study published in Environment International, the first confirmed detection of plastic circulating in the human bloodstream.
It’s Not Just the Fiber
The fiber itself is only part of the story. Many mass-produced textiles are colored using synthetic dyes and treated with chemical finishes designed to improve wrinkle resistance, stain resistance, moisture management, or durability.
For some people, these chemicals can cause skin irritation. DermNet NZ and dermatology literature dating back to a foundational 1995 study in the Journal of the American Academy of Dermatology have linked certain textile dyes — particularly disperse blue dyes commonly used in dark synthetic fabrics — to itching, rashes, and allergic contact dermatitis, especially in areas where clothing fits closely against the skin, such as the neck, waist, underarms, and thighs.
This doesn’t mean every synthetic garment will cause a reaction. But it does highlight a broader issue: most consumers have very little information about the chemicals used to make and finish the textiles they wear every day.
We carefully read ingredient labels on food. We often check ingredient lists in skincare products. Yet clothing and bedding, which can remain in contact with our skin for hours at a time, typically come with little more than a fiber percentage and washing instructions.
Natural Fibers: A Sustainable Alternative
One of the most promising solutions to plastic pollution from textiles lies in a return to natural fibers, such as organic cotton, hemp, and linen. These materials offer a significantly improved environmental and health profile:
● Renewably sourced, derived from plants rather than fossil fuels.
● No microplastic shedding, since natural fibers don’t release plastic particles during washing.
● Compatible with plant dyes, enabling reduced reliance on the synthetic dyes commonly used throughout the textile industry.
● Biodegradable at end of life, returning safely to the earth instead of persisting in landfills for decades.
While natural fibers have clear health and environmental benefits, they compete against synthetic products from petroleum, which is heavily subsidized and makes plastic fibers artificially cheap. Beyond cost, a major challenge for the natural fibers industry has been transparency — helping consumers actually see what’s in the textiles they buy.
A Breakthrough: AIZOME’s Textile Health Facts
Companies like AIZOME are pioneering a new era of textile transparency with Textile Health Facts — a label inspired by the familiar Nutrition Facts panel found on food packaging.
Unlike the fiber-percentage tags typically found on clothing, Textile Health Facts is designed to:
● Disclose fiber content, clearly and in plain language.
● List dye ingredients, so consumers know what’s actually touching their skin.
● Make information accessible, without replacing existing certifications or making health claims.
● Surface certifications and traceability, connecting the finished garment back to its source.
The goal isn’t to diagnose or promise outcomes; it’s to help consumers ask better questions about the products they buy. Just as food labels helped people better understand what they eat, textile transparency could help people better understand what they wear.
Your Purchasing Power Can Help Create Systems Change
Consumers hold real power in shaping the future of textiles. By choosing natural fibers, supporting nontoxic plant dyes, and looking for credible, transparent labeling, shoppers send a message to the industry that safety and honesty are no longer optional — they’re expected.
Most synthetic textiles are difficult to recycle and often end up in landfills or are openly dumped and burned, causing significant pollution for nearby communities. Natural fibers, free from plastic blends and harmful chemical finishes, offer a different path: longer-lasting materials with the ability to biodegrade at the end of their useful life instead of becoming long-term waste. This is one of the core principles of a circular economy: designing products that work with natural systems rather than against them.
Natural-fiber clothing, when thoughtfully designed and cared for, can be long-lasting. Repairing worn pieces can extend their useful life even further, whether through traditional techniques such as sashiko (“visible mending”) or patch embroidery, or contemporary repair services.
Clothing and bedding are often the overlooked part of the plastic pollution conversation. But the long-term goal is bigger than simply replacing one material with another. It’s building a textile system rooted in transparency, accountability, and true circularity, where products are designed to leave behind neither plastic pollution nor unnecessary chemical residues.
The future of clean textiles begins with understanding what’s in the products we wear every day. And that future starts with transparency.
