When you train, your kit sits close to your skin for hours — in heat, sweat, and constant movement. Performance matters, but so does what’s behind the fabric.
At Viren, we choose materials that support your training and meet a cleaner baseline for what touches your body. That’s why all three of our ranges — Prowess, Higher Power, and Aftermath — are OEKO-TEX® Standard 100 certified.
What is OEKO-TEX® Standard 100?
OEKO-TEX® Standard 100 is a globally recognised testing and certification system for textiles. In simple terms: it means the certified textile components have been tested against a list of harmful substances and must meet strict limit values — especially important for products worn close to the skin.
It’s one of the clearest, most widely used standards for creating a safer-chemicals baseline in fabric.
Why this matters for activewear (and layers you live in)
Activewear is different from many other categories because it’s:
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Worn close to skin (often for long periods)
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Used in heat + sweat, which increases skin contact
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Designed for high friction and movement (leggings, sports bras, fitted layers)
And if you’re anything like us, it’s not just gym wear — it’s what you’re in for school runs, travel days, dog walks, and “I’ll change later” afternoons.
OEKO-TEX is one way we help make sure what we make is not only high performance — but also aligned with a cleaner standard.
What OEKO-TEX does (and doesn’t) mean
A good certification should be easy to understand.
What it does mean
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Fabric components are tested for a range of substances that may be harmful
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Products must meet defined limit values to pass certification
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The standard is especially strict for items worn next to skin
What it doesn’t mean
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It isn’t a full sustainability score (it doesn’t measure carbon footprint)
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It doesn’t automatically mean “organic”
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It isn’t a guarantee that every part of a supply chain is perfect
For us, OEKO-TEX is best viewed as a high-trust baseline — a practical, third-party checked standard that supports our “Train Clean” approach.
Our fabric standards at Viren
We’re performance-first — always. But performance doesn’t need to come at the expense of peace of mind.
Across our ranges, we focus on:
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Technical performance: compression, stretch + recovery, breathability, and durability
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Construction you can feel: supportive waistbands, clean seams, zero fuss in motion
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Third-party testing: OEKO-TEX® Standard 100 certification across Prowess, Higher Power, and Aftermath
If you want to go deeper into the specific fabric compositions and performance features, you can explore our fabric page here: Our Fabrics
How to shop “cleaner” activewear (without getting overwhelmed)
If you’re comparing brands, a few simple checks help:
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Look for third-party standards (not just marketing claims)
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Check transparency: fabric composition, construction details, care guidance
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Prioritise longevity: the most sustainable piece is the one you’ll wear for years
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Choose comfort + function: if it doesn’t perform, it won’t stay in your rotation
The bottom line
We built Viren for women who train — strength days, reformer sessions, and everything in between. OEKO-TEX® Standard 100 certification across our ranges is one of the ways we back up what we believe: performance you can trust, with a cleaner baseline built in.
Explore the collections: