That Label Might Be Lying to You
You flip over a sweater tag at a store. It says "Natural," "Eco-Friendly," or "Sustainable." You feel good about your purchase.
But when you get home and actually read the fabric content, you discover it's 70% polyester.
Welcome to greenwashing—where marketing words don't match material reality.
Learning to read fabric labels is your superpower against deceptive marketing. Let's decode what those tags really mean.
The Only Section That Matters: Fiber Content
Every garment sold must have a fiber content label. This is the only part that's legally regulated—everything else (the "eco-friendly" or "natural" marketing) is just fluff.
Where to Find It:
- Inside collar, side seam, or waistband
- Lists fabric percentages by weight
- Example: "60% Cotton, 40% Polyester"
This label tells you everything you need to know about:
- Sustainability
- Breathability
- Durability
- Whether it's actually natural or synthetic
Natural vs. Synthetic: The Fundamental Divide
Natural Fibers (From Plants or Animals):
- Merino wool
- Cashmere
- Alpaca
- Cotton (organic or conventional)
- Linen
- Silk
- Hemp
- Bamboo (when processed mechanically, not chemically)
Characteristics:
✅ Biodegradable
✅ Breathable
✅ Temperature-regulating
✅ Generally better for health
✅ Renewable (when sourced responsibly)
Synthetic Fibers (Petroleum-Based Plastic):
- Polyester
- Nylon
- Acrylic
- Spandex/Elastane
- Rayon (semi-synthetic, chemically processed)
- Viscose (semi-synthetic)
- Modal (semi-synthetic)
Characteristics:
❌ Not biodegradable (200+ years in landfills)
❌ Sheds microplastics
❌ Traps heat and moisture
❌ Contains chemicals
❌ Made from petroleum
Decoding Common Label Terms
"Natural"
What brands want you to think: This garment is made from natural materials.
What it might actually mean: Contains some amount of natural fiber, but could still be majority synthetic.
Example: "Natural Blend" = 30% cotton, 70% polyester
How to spot it: Check fiber content. If it lists polyester, nylon, acrylic, or spandex, it's not truly natural.
"Sustainable"
What brands want you to think: This garment is environmentally friendly.
What it might actually mean: Absolutely anything. "Sustainable" has no legal definition in fashion.
Examples of greenwashing:
- "Sustainable polyester" (still plastic, still sheds microplastics)
- "Eco-friendly rayon" (rayon production is chemically intensive and polluting)
- "Sustainable blend" (could be 95% polyester, 5% organic cotton)
How to spot it: Ignore the word "sustainable" entirely. Read the fiber content.
"Organic"
What it actually means: For cotton, means grown without synthetic pesticides or fertilizers. Must be certified.
What to look for:
- GOTS (Global Organic Textile Standard) certification
- Organic content percentage
- Example: "100% Organic Cotton (GOTS certified)"
Watch out for:
- "Organic blend" (might be 10% organic cotton, 90% polyester)
- "Organic" without certification
Organic matters for: Cotton Doesn't apply to: Wool, cashmere (these aren't "organic" or "conventional"—look for ethical sourcing certifications instead)
"Recycled"
What brands want you to think: Environmentally friendly, circular fashion.
What it might actually mean: Made from recycled plastic bottles (which still sheds microplastics and doesn't biodegrade).
The truth:
- "Recycled polyester" is still polyester (still plastic)
- It's better than virgin polyester (uses less petroleum)
- But it's NOT better than natural fibers (still sheds microplastics, still lives in landfills forever)
Use case: Recycled polyester is better than virgin polyester for certain applications (outdoor gear, athletic wear). But it's not a replacement for natural fibers in everyday clothing.
"Bamboo"
What brands want you to think: Natural, sustainable, eco-friendly.
What it might actually mean: Chemically processed into rayon (not actually natural fiber anymore).
The truth:
- Bamboo linen: Mechanically processed, truly natural and sustainable ✅
- Bamboo rayon/viscose: Chemically processed with toxic solvents, not actually natural ❌
How to tell the difference: Check the label:
- "100% Bamboo Linen" = Good
- "Bamboo Rayon" or "Bamboo Viscose" = Chemically processed
Most "bamboo" clothing is rayon, not true bamboo fiber.
"Blend"
What it means: Mixed fibers.
Why brands do this:
- Reduce cost (add cheap polyester to expensive wool)
- Add stretch (add spandex)
- Improve durability (sometimes legitimate)
Examples:
- "Merino Wool Blend" = Could be 50% merino, 50% acrylic
- "Cotton Blend" = Could be 20% cotton, 80% polyester
Red flag: If "blend" doesn't specify percentages on the main tag, it's usually because the natural fiber percentage is low.
Rule: Always read the fiber content. A "cashmere blend" that's 10% cashmere, 90% acrylic is NOT a cashmere sweater.
What "100% Natural Fiber" Actually Means
When you see "100% Merino Wool" or "100% Cotton," this means:
✅ NO synthetic fibers
✅ Completely biodegradable
✅ No microplastic shedding
✅ Truly natural
This is the gold standard.
At Sashū: Every piece is 100% natural fiber. When we say merino wool, we mean 100% merino wool—not a blend.
The Greenwashing Hall of Shame
Terms That Sound Good But Mean Nothing:
"Eco-Friendly"
- No legal definition
- Often used on polyester clothing
- Means nothing
"Conscious"
- Marketing buzzword
- No standards
- Check fiber content
"Green"
- Meaningless without specifics
- Often greenwashing
"Earth-Friendly"
- Vague marketing
- Ignore and check fiber content
"Plant-Based"
- Sounds natural
- Often refers to chemically processed rayon from wood pulp
- Not the same as natural fiber
Rule of thumb: Ignore ALL marketing language. Read ONLY the fiber content label.
How to Read a Label (Step-by-Step)
Step 1: Find the fiber content tag (Inside collar, side seam, or waistband)
Step 2: Read the percentages Example: "60% Cotton, 35% Polyester, 5% Spandex"
Step 3: Identify natural vs. synthetic
- Cotton = Natural ✅
- Polyester = Synthetic ❌
- Spandex = Synthetic ❌
Step 4: Calculate natural fiber percentage In this example: 60% natural, 40% synthetic
Step 5: Decide if it meets your standards
- 100% natural = Ideal
- 95-99% natural with small amount of stretch fiber = Acceptable for some items (jeans with 2% spandex)
- 50-90% natural = Marketing as "natural" but still majority synthetic
- Below 50% natural = Just synthetic clothing
What Percentages Mean in Practice
100% Natural Fiber:
- Best for environment
- Best for health
- Most breathable
- Biodegradable
95-98% Natural (2-5% Spandex/Elastane):
- Acceptable for items that need stretch (jeans, activewear)
- Still mostly natural benefits
- Won't biodegrade due to synthetic content
70-90% Natural:
- Marketing as "natural" but losing benefits
- Will shed microplastics
- Not fully breathable
- Won't biodegrade
Below 70% Natural:
- Essentially synthetic clothing with some natural fiber added
- Don't be fooled by "cotton blend" labeling
Special Cases: When Blends Make Sense
There are legitimate reasons for small amounts of synthetic fiber:
1. Stretch (2-5% Spandex/Elastane):
- Jeans with 2% spandex = more comfortable, still 98% cotton
- Acceptable trade-off for many people
2. Durability in High-Wear Areas:
- Sock heels reinforced with small amount of nylon
- Still majority natural fiber
The key: Small percentages (under 5%) for functional purposes = reasonable compromise
Large percentages (20%+) = Just a synthetic garment with marketing spin
Certifications That Actually Matter
GOTS (Global Organic Textile Standard):
- Organic fiber content verified
- Environmental and social criteria
- Reliable
OEKO-TEX Standard 100:
- Tests for harmful substances
- Doesn't guarantee natural fibers, but ensures safety
Fair Trade Certified:
- Ethical labor practices
- Doesn't guarantee natural fibers
Responsible Wool Standard (RWS):
- Animal welfare standards for wool
- Land management requirements
Look for these on hang tags or in product descriptions.
Red Flags: Signs of Greenwashing
🚩 Vague environmental claims without specifics "Eco-friendly" without explaining why
🚩 Focus on packaging instead of product "Recycled packaging!" (but garment is 100% polyester)
🚩 Images of nature on synthetic clothing Leaves and earth tones on polyester labels
🚩 "Blend" without percentages Hiding the fact that it's mostly synthetic
🚩 Terms like "plant-based" for rayon Technically true but misleading (chemically processed)
🚩 "Sustainable polyester" Still plastic, still sheds microplastics
Your Label-Reading Checklist
Before buying ANY garment:
☐ Find the fiber content label
☐ Read the percentages
☐ Identify natural vs. synthetic fibers
☐ Calculate total natural fiber percentage
☐ Ignore ALL marketing language ("eco," "sustainable," "natural")
☐ Look for legitimate certifications (GOTS, RWS)
☐ Decide if the fiber content meets YOUR standards
If the fiber content isn't clearly visible or listed, don't buy it.
What Sashū Promises
At Sashū, we believe in radical transparency:
✅ 100% natural fibers (merino wool, cashmere, cotton)
✅ Zero polyester, zero plastic
✅ Clear labeling (no hiding behind "blend" or "natural")
When you buy from us, you know exactly what you're getting.
Shop our pure fibre collection
The Bottom Line
Marketing lies. Labels don't.
Ignore every "eco-friendly," "sustainable," "natural" claim on the hang tag or website.
Read only the fiber content label.
- 100% natural fiber = Worth your money
- Anything with polyester, nylon, acrylic, or "rayon" = Not actually natural
Your purchasing power matters. Vote for transparency with your wallet.