Fiber Guide · B2B Sourcing · Data-Driven
Tencel (Lyocell) Yarn for
Sustainable Fashion.
TENCEL™ Lyocell is the closest thing the sustainable fashion industry has to a fibre with its claims fully verified.
A comprehensive breakdown for sourcing teams.
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Technical Details
Manufacturing specifications.
Decision-grade specs for Tencel (Lyocell) in Sustainable Fashion. Open each block for the numbers, process constraints, and sourcing details that matter before production.
4 sections
26 checkpoints
Quick Read
First-pass technical cues
GSM Range
Lightweight summer pieces (shirts, dresses, blouses): 110–145 GSM
Yarn Count
Fine woven garments (shirts, dresses): 60s–80s Ne combed
Knit Construction
Single jersey: Standard for T-shirts, tops, and lightweight dresses. Best for showcasing TENCEL™'s drape. Low GSM single jersey (120–140 GSM) requires care in cutting to avoid distortion.
Shrinkage
First industrial wash at 40°C: 3–5% length, 2–3% width. Brands making wash-care claims should specify pre-shrinkage (sanforisation or pre-washing in finishing) to reduce residual shrinkage to under 1.5%. For sustainable fashion brands using cold-wash recommendations, pattern allowance of 4% minimum is sufficient.
GSM Range
• Lightweight summer pieces (shirts, dresses, blouses): 110–145 GSM • Core range (T-shirts, casual tops, shorts): 145–175 GSM • Mid-weight transition pieces (layering, light trousers): 175–220 GSM • Heavier statement pieces (unstructured jackets, wide-leg trousers): 220–280 GSM For sustainable fashion collections aiming to minimise material use (a valid sustainability principle), 130–155 GSM in quality woven constructions is the viable range — sufficient fabric integrity without excess weight.
Yarn Count
• Fine woven garments (shirts, dresses): 60s–80s Ne combed • Knit range (T-shirts, casual tops): 40s–60s Ne ring-spun or compact-spun • Heavier casual knits, loungewear crossover: 30s–40s Ne Compact spinning reduces yarn hairiness by 40–50% versus conventional ring spinning and reduces pilling initiation — worth specifying for sustainable fashion brands where garment longevity is a brand promise.
Knit Construction
• Single jersey: Standard for T-shirts, tops, and lightweight dresses. Best for showcasing TENCEL™'s drape. Low GSM single jersey (120–140 GSM) requires care in cutting to avoid distortion. • Interlock: Suitable for more structured sustainable pieces; dimensional stability is better than single jersey, and the tighter construction reduces fibrillation risk. • Woven plain weave and twill: Preferred for shirting, dresses, and trousers in sustainable fashion. Woven construction handles the low-stretch character of TENCEL™ better than bias-cut knit constructions. • Terry and french terry: Growing category for sustainable loungewear-adjacent pieces; TENCEL™ terry at 280–320 GSM performs well.
Shrinkage
First industrial wash at 40°C: 3–5% length, 2–3% width. Brands making wash-care claims should specify pre-shrinkage (sanforisation or pre-washing in finishing) to reduce residual shrinkage to under 1.5%. For sustainable fashion brands using cold-wash recommendations, pattern allowance of 4% minimum is sufficient.
Pilling Resistance
Grade 3–4 (ISO 12945-1 Martindale method) for pure TENCEL™ Lyocell without enzyme finishing. Post bio-polishing improves this to grade 4–4.5. Blending 15–20% modal increases pilling resistance to grade 4.5–5 with minimal impact on sustainability profile.
Colorfastness
• Wash (ISO 105-C06): Grade 4–5 • Light (ISO 105-B02): Grade 4–5 • Dry rubbing (ISO 105-X12): Grade 4–5 • Wet rubbing: Grade 3–4 Note for sustainable fashion: AZO-free reactive dyes are fully compatible with TENCEL™ Lyocell and should be standard spec. Low-liquor-ratio dyeing (LLR) reduces water and energy use further, compatible with TENCEL™ Lyocell's dye uptake profile.
Tensile Strength
• Dry: 34–38 cN/tex • Wet: 34–38 cN/tex (near-full wet strength retention — key differentiator from viscose and bamboo viscose)
MOQ Guidance
• Yarn: 500–1,000 kg per count/colour from Lenzing-licensed Indian spinners • Fabric: 1,000–2,000 metres per colour per construction (standard); 500–800 metres possible at specialty sustainable mills with development premium • Finished garments: 300–500 pieces per style per colour at specialist sustainable factories; mainstream CMT requires 1,000+
Honest Assessment
Every fibre has limits. Here's the full picture.
Every fibre has limits. Here's the full picture.
Strengths
Limitations
Verifiable closed-loop chemistry
: The 99.7% solvent recovery rate is not a corporate claim — it's audited by EU Ecolabel certification bodies. Sustainable fashion brands can cite this figure in marketing with third-party backing, which is increasingly important under EU Green Claims Directive scrutiny.
Zero inherent stretch — design constraints
: TENCEL™ Lyocell has approximately 14–16% elongation at break and near-zero elastic recovery. Sustainable fashion collections requiring body-conscious fit, active silhouettes, or any stretch-dependent style must add elastane, which breaks biodegradability. This is a genuine design constraint that should be resolved at the product development stage, not the sourcing stage.
FSC-certified raw material with measurable land efficiency
: Eucalyptus wood pulp from FSC-certified forests provides a raw material story that conventional cotton, wool, and silk cannot match for environmental defensibility. The 10–20x water use reduction versus cotton is a compelling data point for water-stressed market narratives.
Higher cost than bamboo viscose competitors with similar marketing positioning
: Bamboo viscose is frequently marketed with similar sustainability language to TENCEL™ Lyocell but at 15–30% lower yarn cost. The key difference: bamboo viscose is mostly produced via conventional viscose chemistry with the environmental issues that entails. TENCEL™ Lyocell's higher cost reflects genuinely better production credentials. Sustainable fashion brands need to be prepared to defend the price premium if buyers compare TENCEL™ to bamboo fabrics.
Full biodegradability (pure form)
: EN 13432-certified compostable. No microplastic shedding. End-of-life story is genuinely clean for unblended garments — a meaningful differentiator as EPR regulations expand globally.
Pilling without enzyme finishing — supply chain dependency
: The fibrillation risk is real and entirely avoidable but requires a manufacturing step that some lower-tier factories omit or under-dose. For sustainable fashion brands often working at lower MOQs with smaller factories, verifying this process step is critical. One bad batch of poorly finished TENCEL™ can damage a brand's quality reputation despite the issue being fixable.
Strong tactile quality supporting premium sustainable positioning
: The silk-like drape and hand feel support RSP of ₹1,500–5,000+ for T-shirts and casual pieces, which is where sustainable fashion brands need to price to achieve viable margins given higher production costs.
Energy-intensive production process
: The NMMO solvent system, while environmentally superior to viscose, is an industrial process requiring significant energy inputs. Published carbon footprint data of 2.0 kg CO₂e/kg is competitive but not zero. Brands making carbon-neutral claims must account for scope 3 emissions including fibre production — renewable energy at manufacturing facilities is the primary mitigation lever.
TENCEL™ brand recognition building consumer trust
: Pre-existing consumer awareness reduces the education burden for sustainable fashion startups. Hang tags with the TENCEL™ logo are a purchase trigger among the target demographic.
AZO-free reactive dye compatibility with colour depth
: Low-impact dye processes are fully compatible without sacrificing the colour vibrancy that drives premium sustainable fashion aesthetics.
Strength
Verifiable closed-loop chemistry
: The 99.7% solvent recovery rate is not a corporate claim — it's audited by EU Ecolabel certification bodies. Sustainable fashion brands can cite this figure in marketing with third-party backing, which is increasingly important under EU Green Claims Directive scrutiny.
Limitation
Zero inherent stretch — design constraints
: TENCEL™ Lyocell has approximately 14–16% elongation at break and near-zero elastic recovery. Sustainable fashion collections requiring body-conscious fit, active silhouettes, or any stretch-dependent style must add elastane, which breaks biodegradability. This is a genuine design constraint that should be resolved at the product development stage, not the sourcing stage.
Strength
FSC-certified raw material with measurable land efficiency
: Eucalyptus wood pulp from FSC-certified forests provides a raw material story that conventional cotton, wool, and silk cannot match for environmental defensibility. The 10–20x water use reduction versus cotton is a compelling data point for water-stressed market narratives.
Limitation
Higher cost than bamboo viscose competitors with similar marketing positioning
: Bamboo viscose is frequently marketed with similar sustainability language to TENCEL™ Lyocell but at 15–30% lower yarn cost. The key difference: bamboo viscose is mostly produced via conventional viscose chemistry with the environmental issues that entails. TENCEL™ Lyocell's higher cost reflects genuinely better production credentials. Sustainable fashion brands need to be prepared to defend the price premium if buyers compare TENCEL™ to bamboo fabrics.
Strength
Full biodegradability (pure form)
: EN 13432-certified compostable. No microplastic shedding. End-of-life story is genuinely clean for unblended garments — a meaningful differentiator as EPR regulations expand globally.
Limitation
Pilling without enzyme finishing — supply chain dependency
: The fibrillation risk is real and entirely avoidable but requires a manufacturing step that some lower-tier factories omit or under-dose. For sustainable fashion brands often working at lower MOQs with smaller factories, verifying this process step is critical. One bad batch of poorly finished TENCEL™ can damage a brand's quality reputation despite the issue being fixable.
Strength
Strong tactile quality supporting premium sustainable positioning
: The silk-like drape and hand feel support RSP of ₹1,500–5,000+ for T-shirts and casual pieces, which is where sustainable fashion brands need to price to achieve viable margins given higher production costs.
Limitation
Energy-intensive production process
: The NMMO solvent system, while environmentally superior to viscose, is an industrial process requiring significant energy inputs. Published carbon footprint data of 2.0 kg CO₂e/kg is competitive but not zero. Brands making carbon-neutral claims must account for scope 3 emissions including fibre production — renewable energy at manufacturing facilities is the primary mitigation lever.
Strength
TENCEL™ brand recognition building consumer trust
: Pre-existing consumer awareness reduces the education burden for sustainable fashion startups. Hang tags with the TENCEL™ logo are a purchase trigger among the target demographic.
Strength
AZO-free reactive dye compatibility with colour depth
: Low-impact dye processes are fully compatible without sacrificing the colour vibrancy that drives premium sustainable fashion aesthetics.
Common Questions
Tencel (Lyocell) for Sustainable Fashion — answered.
TENCEL™ for Sustainable Fashion — answered.
Organic cotton has a strong consumer story and familiar fibre character (cotton feel, durability, stretch in jersey). TENCEL™ Lyocell wins on water footprint (30 vs 1,500+ litres/kg), carbon footprint, and end-of-life biodegradability in both soil and marine environments. Organic cotton's durability through repeat washing is higher, and pilling is less of a concern. For sustainable fashion brands where the environmental narrative is the primary differentiator, TENCEL™ Lyocell makes stronger, more specific environmental claims. For brands where comfort familiarity and perceived naturalness drive purchase, organic cotton is easier to communicate. Many sustainable fashion leaders blend both — 50/50 TENCEL™/organic cotton delivers a balanced story.
More Resources
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The difference isn't marketing.
It's in the fibre.
One wash cycle won't tell you. Thirty will.
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