The Problem
Most Activewear is Made of Plastic.
And the problem with traditional plastic activewear is that it...
Leaches Harmful Microplastics
Every time you wear polyester, millions of microplastics shed from the clothes onto your skin and into the air around you. Do you really want that on your skin?
Made With Toxic Chemicals (Like BPA)
A shocking study found that 100+ activewear brands contained high levels of endocrine disrupting BPA - some even have 40x the legal limit!
May Have Fertility Impacts
A groundbreaking study showed wearing polyester underwear made men azoospermic - meaning their sperm count dropped to zero.
Our Solution
Made of Natural Fibers
We use 100% organic cotton & 100% Merino wool - no polyester or plastic-based fabrics.
Certified Non-Toxic
Our organic cotton is GOTS certified and our suppliers hold OEKO-TEX Standard 100 certifications, ensuring no harmful chemicals commonly found in traditional activewear.
Breathable & Odorless
Our organic cotton is highly breathable and our Merino wool naturally resists bacteria growth, so you can wear them longer and wash them less.
Made of Natural Fibers
We use 100% organic cotton & 100% Merino wool - no polyester or plastic-based fabrics.
Certified Non-Toxic
Our organic cotton is GOTS certified and our suppliers hold OEKO-TEX Standard 100 certifications, ensuring no harmful chemicals commonly found in traditional activewear.
Breathable & Odorless
Our organic cotton is highly breathable and our Merino wool naturally resists bacteria growth, so you can wear them longer and wash them less.
Athletic Fit & Feel
Our shorts don't fit like some nerdy health product. They have the same exact "activewear" fit you need - without the plastic fabrics.
3rd Party Tested
Not only do we rely on third party certifications, we independently test all of our fabrics - they're completely free of BPA, PFAS, and hormone disruptors.
Super Soft & Comfortable
We use superfine organic cotton & Merino wool - ensuring the softness and comfort you need.
Athletic Fit & Feel
Our shorts don't fit like some nerdy health product. They have the same exact "activewear" fit you need - without the plastic fabrics.
3rd Party Tested
Not only do we rely on third party certifications, we independently test all of our fabrics - they're completely free of BPA, PFAS, and hormone disruptors.
Super Soft & Comfortable
We use superfine organic cotton & Merino wool - ensuring the softness and comfort you need.
SHOP NATURAL FIBER ACTIVEWEAR
Why Michael Morelli Loves Ryker...
"Ryker's shorts are breathable and lightweight - providing all of the comfort and performance without the plastic-based fabrics. I literally threw out thousands of dollars of other shorts and wear my Ryker's 7 days a week."
- Michael Morelli
Performance Health Engineer & Best Selling Autor
Save 10% with code "FITSCRIPTMM"
Why Michael Morelli Loves Ryker...
"Ryker's shorts are breathable and lightweight - providing all of the comfort and performance without the plastic. I literally threw out thousands of dollars of other shorts and wear my Ryker's 7 days a week."
- Michael Morelli
Performance Health Engineer & Best Selling Autor
Get 10% off
Ryker
vs. "The Other Guys"
We're up against Big Brands - but we think we compare just fine.
100% organic cotton +
100% Merino wool
Naturally breathable, Merino wicks sweat & fights odor
3rd party tested + OEKO-TEX Certified
Doesn't load your balls with microplastics
Naturally Antimicrobial
"The Other Guys"
100% Plastic (polyester, nylon, spandex)
Polyester traps heat & moisture - making you stink
Often contains high levels of BPA, Phlates and PFAs
Loads your balls with microplastics
Traps Sweat & Bacteria
Shop natural fiber activewear
Repped by thousands of real people
See why 50,000+ real customers have ditched their polyester gym shorts...
I was skeptical natural fibers would perform as well as polyester, but I was wrong...
Been trying to avoid plastic clothes but wasn't sure natural fibers could compete. I mean wool and cotton for the gym? But happy to say I was wrong about these - they're surprisingly stretchy & fit very similar to my Lulus. Will be buying more.
Jason M., Los Angeles
Wanted to avoid plastic clothes but didn't want to sacrifice comfort or function - these do the job
I don't want to be wearing plastics for my health but wasn't ready to give up my synthetics. However, I've been surprised that these have held up, wicked sweat and fit just as well.
Connor B., New York City
Happy to not be wearing plastic in the gym or sauna anymore...
Yes they're expensive, but I'm happy to not be wearing plastic to the gym and in the sauna anymore. They're also surprisingly stretchy - very different than many other natural brands.
Ethan K., Austin Texas
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See What Customers Are Saying...
Frequently Asked Questions
What's the problem with polyester?
Polyester is actually a type of plastic. This means it sheds microplastics onto your skin with every wear, often contains toxic endocrine disrupting plastic chemicals (like BPA), and some studies show it can impact fertility.
What materials do you use?
We use natural fabrics like 100% organic cotton & Merino wool. These fabrics are from nature - not a lab. By choosing natural fabrics, you reduce your exposure to the microplastics and toxic chemicals often found in synthetic fabrics.
Why is it more expensive than some other synthetic brands?
Because we don't compromise. Because we only use high quality, organic fabrics like 100% organic cotton & Merino wool, our product costs are substantially higher than big brands who sell cheap materials (polyester) at a premium price.
Additionally, we only partner with ethical manufacturers who maintain GOTS & OEKO-TEX Standard 100 certifications, pay their workers a fair wage, and maintain safe conditions for their staff.
Last thing - we're proud that we're still priced competitively to premium brands like Lululemon, Vuori, Rhone and Ten Thousand - despite using high quality, 100% natural materials.
What are GOTS & OEKO-TEX Standard 100?
GOTS is the Global Organic Textile Standard. It means our cotton has been grown & processed without the synthetic pesticides or toxic chemicals (like formaldehyde), commonly found in conventional cotton.
OEKO-TEX Standard 100 means all of our fibers, fabrics, and dyes have been 3rd party tested for a variety of toxic substances - including BPA, PFAS and other endocrine disruptors. When you wear Ryker, you can be confident you're only wearing the best.
What dyes do you use?
We use water based fiber reactive dyes that comply with GOTS & OEKO-TEX Standard 100 class 1 standards.
They're independently tested for heavy metals & other toxins commonly found in the apparel industry.
Are your clothes 3rd party tested?
Yes. Not only do we rely on regular factory audits from the governing bodies of GOTS & OEKO-TEX Standard 100, but we also independently test our fabrics & end garments.
You can see our latest test here. Completely free of BPA, PFAs, and phthalates.
Where are your products made?
We currently work with GOTS and OEKO-TEX Standard 100 certified manufacturers in Turkey & Vietnam.
Previously, we've worked with some GOTS and OEKO-TEX Standard 100 certified manufacturers outside of Shanghai China.
For some limited edition styles, we're currently exploring American production. More on this soon!
Every single factory we work with (or will work with) is compliant with GOTS & OEKO-TEX Standard 100, and has been audited for fair pay, safety, and chemical usage.
Additionally, we 3rd party test our garments & fabrics to ensure compliance with our rigorous standards.
What size should I get / will your products shrink?
We almost recommend customers "size up" from whatever they wear in synthetic brands. For example, if you're a medium in Lulu shorts, opt for a large in Ryker.
This is because our gear tends to run a bit small + shrinks ~5% in the wash. This is inherent to a high quality natural fiber.
"Pre-shrunk" cotton is often treated with harmful chemicals to make it that way - and that's not what we're about.
We always recommend washing on the most gentle setting available + laying flat to dry to reduce shrinkage.
What's the return policy?
We offer a 90 day return policy. As long as the garment is unused (meaning, you don't wear it several times and then decide to return), we will accept your return.
We want happy customers - not annoyed customers. So we're pretty generous here.
Shop natural fiber underwear