Opening
MATE the Label, an apparel company based in California, has positioned itself as a leader in plastic-free essentials. The brand's sustainability page features a bold header declaring that it has eliminated plastic from its products. The same page states that customers will never find polyester, nylon, or polyamide in MATE products. A review of the brand's own product detail pages tells a different story.
The claim
On its sustainability page (https://matethelabel.com/pages/about), MATE the Label states: "Plastic doesn't belong in your closet, or the planet. That's why we've eliminated it entirely from our labels and packaging."
The page continues with "The MATE Eight," a set of core values that includes a plastic-free heading. The brand states it has "eliminated all the plastic in our labels and packaging, and even developed MOVE by MATE which only uses 8% spandex" and then adds: "You won't ever find polyester, nylon, or polyamide in our products."
The product page
MATE the Label's Organic Cotton Sock 3 Pack product page (https://matethelabel.com/products/organic-cotton-sock-3-pack-natural) lists the following fiber content: "80% Organic Cotton, 17% Nylon, 3% Spandex."
The Organic Cotton Sock 5 Pack (https://matethelabel.com/products/organic-cotton-sock-5-pack-bone-forest-maple-jet-black-birch) lists identical fiber content: "80% Organic Cotton, 17% Nylon, 3% Spandex."
The Organic Cotton Trouser Sock (https://matethelabel.com/products/organic-cotton-trouser-sock-bone) also lists: "80% Organic Cotton, 17% Nylon, 3% Spandex."
Nylon is a synthetic polymer. It is a type of polyamide. The brand's own sustainability page states customers will never find nylon or polyamide in MATE products. The sock product pages list 17% nylon.
The gap
The gap here is straightforward:
- The claim: "You won't ever find polyester, nylon, or polyamide in our products."
- The product page: 17% nylon, 3% spandex.
Nylon is a synthetic textile composed of polyamide polymer chains. As fabric resource Paramatex notes: "Polyamide is a category of synthetic fibers, and nylon is one type of it. All nylon is polyamide, but not all polyamide is nylon."
When a brand says "you will never find nylon or polyamide in our products," these are not two separate categories. Nylon is polyamide. A product containing nylon contains polyamide.
Spandex, the other synthetic in the socks, is also a fully synthetic fiber. "It's made from a type of petroleum-based plastic called polyurethane." The brand positions its MOVE activewear as using "only 8% spandex," framing this as a positive disclosure under a plastic-free heading.
As one sustainability analysis noted: "My issue is with how those materials are being communicated. You cannot market yourself as plastic free, or state that you will never use certain fibers, and then include them in your products!! And while the spandex content is technically listed, placing it underneath a big bold plastic free heading implies that it is not plastic derived."
What the brand has published elsewhere
According to an Ecolife brand report: "MATE the Label keeps its fiber portfolio intentionally small to reduce chemical burden and has excluded major synthetics: polyester, nylon, and polyamide since 2018."
This characterization does not match the fiber content listed on the brand's own sock product pages. The socks contain 17% nylon. That is not an exclusion of nylon.
A separate analysis from April 2026 noted additional concerns about website accuracy: "It is literally where customers go to verify your claims. Also, a factory they used to work with reached out to me directly and told me they stopped working with MATE in 2023, and their name is still listed on the website today. So this page has not just been neglected for a few months. Parts of it appear to have gone untouched for at least two years, and possibly much longer."
What other brands in the category are doing
Several brands in the natural fiber basics category have taken different approaches to synthetic fibers and their communication.
Rawganique
Rawganique (https://rawganique.com/collections/organic-socks) has built its entire sock line around genuinely plastic-free construction. The brand's product pages state: "These special organic cotton socks are breathable, non-confining and 100% biodegradable: no elastane, no spandex, no polyester, no polyamide, no nylon, no chemical treatments, no forever chemicals and no synthetics of any kind whatsoever."
Rawganique does not claim plastic-free under a heading that then discloses nylon content. The brand states clearly what it excludes and delivers products that match.
Wellicious
Wellicious (https://www.wellicious.com/) takes a different approach: it uses elastane but specifies the type. The brand describes its products as "crafted from GOTS-certified organic cotton and biodegradable elastane" and notes "our fabrics are Cradle to Cradle Certified™, ensuring they meet the highest environmental and ethical standards while offering exceptional comfort and performance."
According to Bottlecup's review: "London born brand, Wellicious makes long lasting yoga clothing and activewear from GOTS certified organic cotton and compostable elastane which breaks-down without releasing any harmful substances into the environment and tested by Hohenstein. They are Cradle to Cradle certified for material health, avoiding harmful toxins and additives with no trace of microplastics."
Wellicious uses elastane but does not market itself as plastic-free. The brand specifies the elastane type and provides third-party certification for its claims.
KENT Underwear
KENT (https://www.noplasticnoproblem.com/blog/the-best-clothing-brands-that-are-100-plastic-free), an underwear brand, has eliminated synthetic content entirely from its product line. "Most underwear is made almost entirely from synthetics, but KENT set out to fix that with 100% GOTS-certified organic pima cotton basics for both men and women. No spandex, no elastane, no polyester thread. Even the dyes are either GOTS-certified or made from fruits, flowers, minerals and spices for their small-batch colors."
KENT does not claim to minimize synthetic content. The brand has eliminated it entirely and states so directly.
What nylon and spandex actually are
For clarity on materials:
- Nylon, "also known as polyamide (PA), was the very first synthetic fiber ever made and only the fifth basic textile development in nearly 4,000 years. This amazingly versatile material is derived from petrochemicals and is among the most widely used engineered thermoplastics on the planet."
- Spandex (also called elastane or Lycra) is the same fiber under different names. "Spandex is simply the generic name used mainly in the U.S. Lycra is a branded version of elastane developed by DuPont." It is made from polyurethane, which is a plastic.
- Polyamide fibre, "also known as nylon fibre, is a synthetic fibre made from polymers containing amide monomers."
As noted in a review of organic cotton socks: "Unfortunately, it's very difficult to find 100% organic cotton socks. Organic cotton socks often contain a small percentage of a synthetic fabric like elastane, polyamide, or nylon to make them more stretchy and durable."
The issue is not using nylon or spandex in socks. Many brands do. The issue is claiming you never use nylon while your product pages list it.
Why this matters for brand founders
As noted in a 2026 activewear comparison: "True plastic-free activewear contains no polyester, no nylon (polyamide), and no conventional petroleum-based fibers in its primary fabric. Most brands in this space use one of three base fibers: TENCEL™ Lyocell (from eucalyptus), TENCEL™ Modal (from beechwood), organic cotton, or merino wool."
The same analysis notes: "The stretch component is where it gets complicated. Nearly all activewear requires some elastane (spandex) for mobility and fit, and elastane is technically synthetic. The question is how much, what kind, and whether it's been tested for harmful substances."
Brands that use elastane while making honest disclosures are not the problem. Brands that use nylon while stating they never use nylon are creating a gap between claim and spec.
What a brand founder should ask
A founder reviewing plastic-free or low-synthetic claims for their own brand should put these questions to their sourcing lead or supplier:
- What is the complete fiber composition of every SKU? Not just the primary fiber. Every component, including thread, elastic, and reinforcement yarns.
- Is any synthetic fiber present in any product? If yes, list each product and the percentage.
- Does our marketing language match our product specs? If we claim "no nylon," do any PDPs list nylon?
- What is elastane, and what is it derived from? If elastane appears in any product, can we still use the term "plastic-free" without clarification?
- When was our sustainability page last audited against current product offerings? If we discontinued a factory or added a new SKU, has the page been updated?
- Are there third-party certifications for our fiber claims? GOTS, OEKO-TEX, and Cradle to Cradle all have specific standards. Unverified claims are marketing language.
- Would a reasonable customer reading our marketing expect synthetics in this product? If the answer is no, and synthetics are present, the communication is creating a gap.
A note on context
The brand has a strong natural fiber portfolio: "MATE has a strong natural fiber portfolio. In all of their items, you can find either organic cotton, organic linen, regenerative hemp, etc."
According to Ecolife's brand report: "MATE the Label centers its model on organic, plant-based, non-toxic materials, localized manufacturing in Los Angeles, and plastic-free apparel and packaging. Since 2020, the brand has moved from directional claims to data-backed LCAs and Scope 1-3 disclosure, achieved/maintained Climate Neutral/Climate Label certification."
The brand has done meaningful work on natural fibers, supply chain transparency, and low-impact dyes. The concern here is not the existence of spandex or nylon in some products. The concern is the gap between a bold plastic-free heading and the actual fiber content. Brands with strong sustainability credentials have more to lose when their marketing outpaces their specs.
OHZEHN-TEX™ provides ingredient-level fiber transparency for brands that need their marketing claims and product pages to match.
Closing
The sock product pages have not changed since the April 2026 analysis was published.
Sources
https://matethelabel.com/pages/about https://matethelabel.com/products/organic-cotton-sock-3-pack-natural https://matethelabel.com/products/organic-cotton-sock-5-pack-bone-forest-maple-jet-black-birch https://matethelabel.com/products/organic-cotton-trouser-sock-bone https://www.implasticfree.com/listing/mate-the-label/ https://sustainablefashionfriend.substack.com/p/deep-dive-mate-the-label https://tripulse.co/blogs/news/plastic-free-activewear-elastane-guide https://rawganique.com/collections/organic-socks https://www.wellicious.com/ https://us.bottlecup.com/blogs/news/the-best-natural-plastic-free-activewear-brands https://www.noplasticnoproblem.com/blog/the-best-clothing-brands-that-are-100-plastic-free https://www.ecolife.com/brand-reports/how-sustainable-is-mate-the-label https://totebagfactory.com/blogs/news/nylon-fabric https://www.textileblog.com/polyamide-fibre-properties-production-and-uses/ https://paramatex.com/journal/polyamide-and-nylon-in-fabric/ https://www.americhem.com/pages/nylon-synthetic-fibers https://everyrep.com/best-non-toxic-activewear-brands/ https://greenwithless.com/best-organic-cotton-socks/