PFAS in Activewear: What Women Should Know

Activewear is one of the most-treated categories of clothing — designed to be water-resistant, stain-resistant, sweat-wicking, and quick-drying. Many of these properties have historically been achieved with PFAS chemistry. As awareness grows and regulation tightens, brands are increasingly offering PFAS-free alternatives.

Here is the calm, evidence-aligned guide.

A note before we start

Activewear that has been independently tested has occasionally shown PFAS presence — sometimes in surprising items like bras and leggings. Reporting around this is real, ongoing, and warrants thoughtful action without panic.

Why PFAS show up in activewear

Activewear properties often achieved with PFAS:

• Water resistance (rain, sweat barrier)
• Stain resistance
• Quick-dry treatments
• Wrinkle resistance
• Some "moisture wicking" technologies (though many wicking treatments are PFAS-free)

Not every piece of activewear contains PFAS. The presence depends on the specific brand, treatment, and manufacturing decisions.

“Activewear that has been independently tested has occasionally shown PFAS presence — sometimes in surprising items like bras and leggings.”

— Feel AWSM Editorial

What independent testing has found

Several independent investigations (notably 2022–2024) tested major activewear brands and found PFAS in:

• Some leggings (waist bands, fabric blends)
• Some sports bras (especially water-resistant or "stay dry" labelled)
• Some yoga pants
• Some swimwear
• Some workout tops with stain-resistant or quick-dry treatments

Findings varied widely between brands and products. Some brands tested showed minimal or no PFAS; others showed meaningful amounts. The category as a whole is not uniformly problematic.

Why this might matter

PFAS are persistent chemicals that bioaccumulate. Skin contact for hours daily, combined with sweating that can affect chemical migration, raises reasonable questions about exposure. Regulatory action is increasing — the EU's broad PFAS restriction proposal would cover textile applications.

For most healthy adults, occasional or moderate exposure through activewear is likely a small contribution to total PFAS load (which comes from many sources). For pregnant women, women planning pregnancy, and women with high sensitivity, lower-exposure choices are sensible.

How to make sensible activewear choices

Prioritise natural fibres for items in long contact

For yoga, walking, and lower-intensity activities:

• Merino wool activewear — naturally wicking, odour-resistant, no PFAS
• Cotton blends — for low-intensity wear
• Tencel/Lyocell — soft, moisture-managing

For higher-intensity training where moisture management matters more, technical synthetics may be appropriate — but choose carefully.

Look for "PFAS-free" or "PFC-free" labels

Several activewear brands have publicly committed to PFAS-free production:

• Patagonia (transitioning across product lines)
• Vaude (German outdoor brand, PFAS-free leadership)
• Houdini (Swedish, PFAS-free outerwear)
• Many smaller EU technical brands

Look for explicit "PFAS-free" or "PFC-free" claims, ideally with third-party verification.

Skip explicit "water-resistant" claims when not essential

Water-resistance in everyday activewear (yoga, gym) is rarely needed. Save water-resistant performance gear for actual rain/outdoor conditions.

Skip "stay dry" or "stain-resistant" treatments

Most workout sweat doesn't need a "stain-resistant" treatment. Plain natural or technical fabrics work fine.

Bra-specific considerations

Sports bras with water-resistant properties or molded plastic-foam cups have shown more frequent PFAS findings in some testing. For daily wear, simpler bras (uncoated cotton, merino, simple technical fabrics) are usually fine.

Wash before wearing — especially activewear

Removes some surface chemical residues.

Replace in-contact items first

If concerned, prioritise replacing:

1. Sports bras worn daily
2. Underwear-style activewear (panty liners, period activewear)
3. Yoga and gym basics worn for long sessions
4. Sleepwear that doubles as loungewear

What to look for in a brand

• Transparent PFAS-free policy — published, with timeline if transitioning
• Third-party testing mentioned
• OEKO-TEX or Bluesign certifications (Bluesign covers technical wear specifically)
• EU manufacturing or REACH compliance
• Specific ingredient/material disclosure

What to be careful with

• "Natural performance" marketing without specifics
• Vague "non-toxic" claims
• Throwing out functional activewear without need
• Buying replacement activewear that isn't actually verified PFAS-free
• Anxiety beyond the realistic concern level

What to look for vs what to be careful with

When to talk to a healthcare professional

Speak with a doctor about specific concerns related to pregnancy, fertility, or persistent skin reactions to activewear.

The final takeaway

PFAS in activewear is a real, regulator-acknowledged concern that varies enormously by brand and product. Sensible action: prioritise PFAS-free committed brands when buying new, choose natural fibres (merino, cotton, Tencel) where performance allows, skip "water-resistant" and "stain-resistant" treatments when not needed, replace in-contact items first if concerned. Skip the panic; act on the priorities.

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