Nylon
Synthetic polyamide — clothing and gear
Also seen as: polyamide, PA, nylon 6, nylon 6,6
At a glance
Nylon shows up in clothing, activewear, stockings, backpacks, umbrellas, ropes, and many household items. The fibre itself is generally lower concern than what gets added to it — water-repellent coatings, antimicrobial treatments, and dyes. Like polyester, it sheds microfibres in washing and contributes to indoor microfibre dust. Lower volume than polyester globally, but the same concerns apply on a smaller scale.
Quick facts
- What it isSynthetic polymer, polyamide family
- Main jobStrong, stretchy, water-resistant fibre for activewear, hosiery, gear, and engineering plastics
- How exposure happensSkin contact, microfibre dust, finishing chemicals (PFAS-coated nylon)
- Most relevant forActivewear-heavy households, outdoor gear, kids' synthetic sleepwear
- Easy to spot?Yes — "nylon" or "polyamide" on labels
- US snapshotFibre labelling required; PFAS finishes increasingly restricted at state level.
- EU snapshotREACH covers chemical finishes; PFAS restrictions expanding.
- Global contextMajor fibre globally, second to polyester. PFAS-treated nylon is the biggest emerging concern.
Where it commonly shows up
- Personal CareRare
- Cosmetics & MakeupRare
- Oral CareToothbrush bristles, Floss (some)
- Baby & KidsActivewear, Swimwear linings, School backpacks
- Kitchen & FoodMesh strainers, Some cooking utensils
- Cleaning & LaundryBrush bristles, Mesh laundry bags
- Clothing & TextilesStockings, Tights, Activewear, Swimwear, Linings, Lingerie
- Home & LivingRopes, Webbing, Carpets (some)
- Other Daily ItemsBackpacks, Umbrellas, Tents, Bags, Fishing line
What to do about it
If you're buying outdoor gear or rainwear, look for PFAS-free water repellents (or skip the treatment). Use a microfibre filter when washing nylon activewear.
Better choices
- Cotton, wool, or hemp for items where nylon's strength isn't needed
- PFAS-free water-repellent treatments on outdoor gear
- Washing-machine microfibre filter for synthetic activewear
Common questions
Each answer is tagged with how settled the evidence is: Established, Estimate, or To check.
What is nylon in simple terms?Established
Nylon is a family of synthetic polymers called polyamides — the most common types are nylon 6 and nylon 6,6 (numbers refer to the chemistry, not quality). It's strong, stretchy, and lightweight, which is why it ended up in stockings, parachutes, rope, and modern activewear.
Why is it used in everyday products?Established
Strong (stronger than polyester per fibre), stretchy, water-resistant, durable, takes dye well. Great for items that need to stretch and recover — tights, swimwear, activewear — and for things that need toughness — ropes, backpacks, gear.
What names does it go by on labels?Established
Nylon, polyamide, PA, nylon 6, nylon 6,6. Branded versions include Nylon Cordura, Nylon Tactel, Supplex.
Where do we commonly find it at home?Established
Tights and stockings, activewear, swimwear, lingerie, lining fabrics, school backpacks, ropes and webbing, umbrellas, tents, fishing line, toothbrush bristles, and some kitchen utensils.
How does exposure happen?Established
Skin contact (especially with tight stretchy items worn against the body all day), microfibre release in washing, and exposure to finishing chemicals like water-repellents (often PFAS), antimicrobial coatings, or dyes.
How does it affect women, especially during pregnancy?Estimate
The fibre itself is low concern. The bigger concerns are finishes — PFAS water-repellents on nylon outdoor gear are well documented, and PFAS is one of the chemicals to specifically reduce during pregnancy. Skin contact with chemically-treated nylon is generally less of a problem than ingestion or inhalation of those same chemicals.
How does it affect men's health and fertility?Estimate
Same finish-driven concerns. Some research has looked at heat retention from tight synthetic underwear and sperm quality — the evidence suggests a small effect at chronic high temperatures, not a major lever.
How does it affect babies, children, and teenagers?Estimate
Kids' clothing made of nylon is similar to polyester in terms of microfibre shedding and dust exposure. PFAS-treated nylon backpacks and outdoor gear are worth checking — many brands now offer PFAS-free options.
Does it affect older adults differently?To Check
No specific signal. Sensitive skin and heat-trapping effects matter more.
What does the strongest evidence say?Established
Strongest evidence is for microfibre release during washing and for PFAS contamination from treated outdoor gear. The fibre itself is broadly considered stable in normal use.
How serious is the risk from normal daily use?Estimate
Low for untreated nylon items. Moderate for PFAS-treated outdoor gear or nylon-heavy activewear in high-use households. The microfibre concern is gradual and environmental more than acute.
What are safer alternatives?Established
Cotton, hemp, linen, or wool when nylon's specific properties (stretch, water-resistance, ultra-strength) aren't needed. PFAS-free treated nylon for outdoor gear when nylon is genuinely the right material.
How easy or hard is it to avoid?Estimate
Easy to reduce; hard to avoid entirely (most activewear, all stockings, many backpacks). Check labels when buying. Microfibre filtration is the practical mitigation for what you do use.
What's one simple first step right now?To Check
Next time you buy outdoor gear or rainwear, look for "PFAS-free" labelling. The brands offering it are usually proud of the fact — they'll say so on the tag.
What this means for youEstimate
Nylon is fine for most uses. The thing to watch for is the chemistry layered on top — water repellents, antimicrobials, flame retardants. Choose untreated where you can. Filter your microfibres.
Where can I find reliable information?To Check
Same sources as polyester — academic reviews on synthetic fibre shedding, PFAS-in-textiles research, and brand transparency reports on finishes. See References below.
Related guides
MicroplasticsPFAS / Fluorinated ChemicalsFragrance CompoundsPlasticPolyesterSpandexAcrylic FabricCarpet & Carpet BackingWaterproof Coated TextilesStain ResistantWaterproof
Where you’ll meet this
Product categories where this commonly comes up — with what to check and a simple first swap.
Kitchen, Food Storage & ServingOral CareClothing & Home TextilesOther Daily Use Items
Sources
Micro Detox is an educational exposure reduction guide. It is not medical advice and does not diagnose, treat, prevent, or cure any condition. If you are pregnant, trying to conceive, or managing symptoms, speak with a qualified health professional.
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