Your clothes are poisoning you, and here is what to wear instead

Most men do not think about what their clothes are made of. They think about fit, colour, price. The fabric composition label gets a glance at most. This is understandable. It is also a growing problem.

Synthetic fibres now make up 68 percent of all textiles. In 1960 that number was 3 percent. The shift happened because synthetics are cheap to make. Not because they are better to wear.

What the science actually says

A single synthetic garment sheds up to 700,000 microfibers per wash. Those fibers enter waterways, then food chains, then the body. This is not a theory. It is a supply chain with a known endpoint.

Microplastics have been confirmed in human blood, breast milk, placentas, and lung tissue. Harvard Medical School published on this. The NIH funded research on it. The European Food Safety Authority reviewed it. The science is not fringe. It is peer-reviewed and accumulating.

The chemicals are often the bigger concern. PFAS, flame retardants, phthalates, and bisphenols are added during manufacturing to make fabrics water-resistant, anti-odour, or anti-static. They do not stay in the fibers. They leach through skin contact, particularly during heat and sweat. Audrey Gaskins, associate professor at the Rollins School of Public Health at Emory University, put it plainly: "All of these chemicals have been linked to a range of adverse health outcomes in men and women."

"Microplastics are so small they get everywhere in our body. We find them in virtually all body systems and organs."

Audrey Gaskins, Rollins School of Public Health, Emory University

The worst offenders in your wardrobe

Activewear is the worst. Tight fit, prolonged wear, constant sweat. The highest exposure by a significant margin.

Underwear is next. All-day skin contact. Almost always synthetic. Almost nobody thinks about it.

Base layers sit closest to skin for the longest periods, especially through winter.

Casual shirts have high contact hours. Lower risk than the three above but worth addressing.

Outerwear is least urgent. Less direct skin contact. Last on the list for a reason.

You do not need to throw everything out. You need to know where to start. The answer is almost always the same: the pieces that spend the most time touching the most skin.

The good news is that natural fibres have never been better, or more available at prices that do not require a second mortgage.

The natural alternatives, honestly ranked

Cotton is the right place to start for most men. Best for shirts, underwear, and base layers. Easy to find, affordable at every price point. One thing most men do not know: the organic cotton certification on a label applies to the raw fibre, not the finished garment. The dyeing process can still be heavily chemical even when the cotton itself is GOTS-certified. If you are switching for health reasons, look for both certifications together.

Merino wool is the performance natural. It regulates temperature, resists odour, and wicks moisture without shedding microplastics. Here is the thing most people do not realise: a good merino base layer can be worn three days without washing and still not smell. That is not a marketing claim. It is a function of the fibre's natural antibacterial properties. It also changes the cost-per-wear calculation considerably. You are washing it a third as often, which means it lasts far longer.

Linen is underrated and badly underused. Breathable, naturally antibacterial, and it gets better with every wash rather than worse. The knock on linen is that it wrinkles. The honest answer is that a good linen shirt worn with confidence looks better wrinkled than a polyester shirt looks at its very best. Limited to spring and summer, but genuinely excellent in that window.

Down remains the best warmth-to-weight ratio for insulated outerwear when responsibly sourced. Look for RDS certification. Not a synthetic replacement everywhere, but the right call for winter jackets where warmth genuinely matters.

"In 1960, 95 percent of textile fibres were natural. We did not engineer synthetics because they were better for us. We did it because they were cheaper to make."

The Right Garment

Where to start

Replace your underwear first. It costs the least, makes the most immediate difference, and forces you to find two or three natural fiber brands you actually trust. Everything else follows from there.

After that, base layers. Then casual shirts. Work outward from the skin. The goal is not a perfect wardrobe. It is a better one, built deliberately over time.

For a full breakdown of natural fiber brands vetted across price points, read our guide to 15 natural fiber brands worth buying in 2026.