Fiber Guide · B2B Sourcing · Data-Driven
Spandex (Elastane) Yarn for
Activewear.
Spandex — marketed globally as LYCRA® by Invista, elastane in European terminology — is a segmented polyurethane fiber with an elongation capacity of 500–800% and near-complete elastic recovery: the fiber returns to within 1–2% of its original length after repeated extension cycles.
Overall rating: 6.6/10 across 8 dimensions.
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At a Glance
The fibre profile, summarised.
8 dimensions rated on a ten-point scale for Spandex (Elastane) in Activewear. No weighting, no competitor framing, just a direct performance read.
Dimension
Score
Reading
Softness / Hand Feel
Strong
Spandex itself contributes little to hand feel — the host fiber (polyester, nylon, modal) determines tactile quality. However, spandex's elastic recovery eliminates the fabric sag and baggy texture that activewear without stretch develops after wear, which consumers register as garment quality and comfort. The rating reflects spandex's enabling role in comfort, not a direct tactile property.
Durability / Abrasion Resistance
Adequate
Spandex filament has moderate abrasion resistance — it is the soft component in any activewear blend and will show wear before the host fiber. High-friction zones (inner thigh, waistband, seat) in activewear typically show spandex breakdown at 200–300 wash cycles in performance builds, less in economy constructions. LYCRA® SPORT and equivalent performance grades are engineered for 200+ wash cycles in activewear applications with minimal performance loss.
Colour Retention / Colorfastness
Strong
Spandex in activewear is dyed with the host fiber simultaneously in most constructions. In polyester-dominant blends, the disperse dye process achieves ISO 105-C06 wash fastness of 4–4.5/5. Chlorine exposure (pool use) is the primary colorfastness threat — standard spandex degrades and yellows under repeated chlorine exposure. Chlorine-resistant spandex (LYCRA® XTRA LIFE, Invista's chlorine-resistant grade) is a mandatory specification for swimwear and pool-environment activewear.
Breathability / Moisture Management
Adequate
Spandex is hydrophobic — it does not absorb moisture. In activewear constructions, breathability and moisture management are entirely dependent on the host fiber, fabric construction, and any applied moisture-wicking finishes. Spandex contributes nothing to moisture management and, at higher percentages (20%+), can slightly reduce the fabric's breathability by increasing the proportion of non-absorbent material. The rating reflects this neutral-to-marginal role.
Stretch & Recovery
Exceptional
The defining performance dimension. At 500–800% elongation and near-complete recovery, spandex has no functional competitor in this dimension. Even at 5% blend levels in a well-engineered knit construction, spandex transforms a rigid fabric into a body-conforming performance material that recovers its shape after every movement cycle. This is the reason spandex exists in activewear — rated accordingly.
Cost Efficiency
Strong
Spandex yarn costs significantly more per kg than polyester or nylon, but because it is used at 5–20% of fabric composition, its absolute cost contribution per garment is modest — typically ₹15–50/garment depending on blend ratio and garment size. The cost-per-wear math strongly favors spandex-containing activewear over non-stretch equivalents, which deform and lose function within 50–80 wears.
Sustainability / Eco Credentials
Below average
Spandex is a synthetic polyurethane — not biodegradable, not currently recyclable at commercial scale (the segmented polymer structure resists standard PET recycling processes). The manufacturing process involves DMF (dimethylformamide), a solvent with environmental and occupational health concerns at production sites. LYCRA® EcoMade (recycled spandex from pre-consumer waste) is emerging but represents a small fraction of global supply.
Ease of Care / Wash Durability
Strong
Machine washable, durable through 100+ wash cycles when not exposed to chlorine, optical brighteners (which degrade spandex), or high-heat tumble drying. Cold or warm wash (30–40°C), air dry or low-heat tumble. Spandex is more durable in laundering than many consumers assume — the primary degradation driver is heat, chlorine, and certain fabric softeners that coat and break down the polyurethane structure.
Softness / Hand Feel
Spandex itself contributes little to hand feel — the host fiber (polyester, nylon, modal) determines tactile quality. However, spandex's elastic recovery eliminates the fabric sag and baggy texture that activewear without stretch develops after wear, which consumers register as garment quality and comfort. The rating reflects spandex's enabling role in comfort, not a direct tactile property.
Durability / Abrasion Resistance
Spandex filament has moderate abrasion resistance — it is the soft component in any activewear blend and will show wear before the host fiber. High-friction zones (inner thigh, waistband, seat) in activewear typically show spandex breakdown at 200–300 wash cycles in performance builds, less in economy constructions. LYCRA® SPORT and equivalent performance grades are engineered for 200+ wash cycles in activewear applications with minimal performance loss.
Colour Retention / Colorfastness
Spandex in activewear is dyed with the host fiber simultaneously in most constructions. In polyester-dominant blends, the disperse dye process achieves ISO 105-C06 wash fastness of 4–4.5/5. Chlorine exposure (pool use) is the primary colorfastness threat — standard spandex degrades and yellows under repeated chlorine exposure. Chlorine-resistant spandex (LYCRA® XTRA LIFE, Invista's chlorine-resistant grade) is a mandatory specification for swimwear and pool-environment activewear.
Breathability / Moisture Management
Spandex is hydrophobic — it does not absorb moisture. In activewear constructions, breathability and moisture management are entirely dependent on the host fiber, fabric construction, and any applied moisture-wicking finishes. Spandex contributes nothing to moisture management and, at higher percentages (20%+), can slightly reduce the fabric's breathability by increasing the proportion of non-absorbent material. The rating reflects this neutral-to-marginal role.
Stretch & Recovery
The defining performance dimension. At 500–800% elongation and near-complete recovery, spandex has no functional competitor in this dimension. Even at 5% blend levels in a well-engineered knit construction, spandex transforms a rigid fabric into a body-conforming performance material that recovers its shape after every movement cycle. This is the reason spandex exists in activewear — rated accordingly.
Cost Efficiency
Spandex yarn costs significantly more per kg than polyester or nylon, but because it is used at 5–20% of fabric composition, its absolute cost contribution per garment is modest — typically ₹15–50/garment depending on blend ratio and garment size. The cost-per-wear math strongly favors spandex-containing activewear over non-stretch equivalents, which deform and lose function within 50–80 wears.
Sustainability / Eco Credentials
Spandex is a synthetic polyurethane — not biodegradable, not currently recyclable at commercial scale (the segmented polymer structure resists standard PET recycling processes). The manufacturing process involves DMF (dimethylformamide), a solvent with environmental and occupational health concerns at production sites. LYCRA® EcoMade (recycled spandex from pre-consumer waste) is emerging but represents a small fraction of global supply.
Ease of Care / Wash Durability
Machine washable, durable through 100+ wash cycles when not exposed to chlorine, optical brighteners (which degrade spandex), or high-heat tumble drying. Cold or warm wash (30–40°C), air dry or low-heat tumble. Spandex is more durable in laundering than many consumers assume — the primary degradation driver is heat, chlorine, and certain fabric softeners that coat and break down the polyurethane structure.
Technical Details
Manufacturing specifications.
Decision-grade specs for Spandex (Elastane) in Activewear. Open each block for the numbers, process constraints, and sourcing details that matter before production.
3 sections
20 checkpoints
Quick Read
First-pass technical cues
GSM Range
130–160 GSM: lightweight activewear — running shorts, speed training garments, warm-weather performance wear. This range maximizes breathability but has lower opacity; manage white and pastel colorways carefully. 160–200 GSM: the mainstream performance activewear range — training leggings, sports bras, cycling shorts, yoga pants. Sufficient opacity in most colors, adequate compression capability, versatile across temperature ranges. 200–260 GSM: heavyweight activewear for compression garments, cold-weather training wear, high-support sports bras. Provides significant compression force at 18–22% spandex blend; less breathable but higher functional support.
Yarn Count and Denier
Spandex denier: 20D for high compression; 40D for standard performance and fashion activewear; 70D for heavy compression and swim/outdoor applications. Host fiber in polyester-spandex blends: 50D–150D microfiber polyester (smooth, moisture-wicking hand feel) or 75D–100D textured polyester (more breathable, matte surface). In nylon-spandex blends: 40D–70D nylon filament is standard for premium performance feel. For cotton-spandex and modal-spandex blends: host fiber at 30s–40s Ne, spandex at 40D, yielding the soft-touch stretch constructions used in yoga wear and barre apparel.
Knit Construction
4-way stretch single jersey (warp + weft stretch): the primary construction for leggings, shorts, sports bras — provides full range of motion in all directions, produced on circular knit machines. 2-way stretch (weft-only stretch): used for some cycling shorts and tight-fitting tops where directional stretch is intentional design. Interlock with spandex: denser, more stable, used for sports bras and fitted tops requiring shape stability. Power net: open-mesh construction with spandex, used for support panels in sports bras and waistbands — provides high compression with ventilation. Warp knit (raschel/tricot): used for swimwear and technical athletic applications requiring high-tension compression and abrasion resistance.
Shrinkage
Polyester-spandex (typical activewear construction): length 2–4% after first machine wash at 40°C; width 1–3%. Nylon-spandex: similar range, 2–4% length, 1–3% width. Cotton-spandex: higher at 5–8% length shrinkage due to cotton component; requires pre-shrinking specification in tech pack. Spandex itself has near-zero shrinkage — observed shrinkage is from the host fiber. Specify pre-compacted fabric for cotton-dominant blends.
GSM Range
130–160 GSM: lightweight activewear — running shorts, speed training garments, warm-weather performance wear. This range maximizes breathability but has lower opacity; manage white and pastel colorways carefully. 160–200 GSM: the mainstream performance activewear range — training leggings, sports bras, cycling shorts, yoga pants. Sufficient opacity in most colors, adequate compression capability, versatile across temperature ranges. 200–260 GSM: heavyweight activewear for compression garments, cold-weather training wear, high-support sports bras. Provides significant compression force at 18–22% spandex blend; less breathable but higher functional support.
Yarn Count and Denier
Spandex denier: 20D for high compression; 40D for standard performance and fashion activewear; 70D for heavy compression and swim/outdoor applications. Host fiber in polyester-spandex blends: 50D–150D microfiber polyester (smooth, moisture-wicking hand feel) or 75D–100D textured polyester (more breathable, matte surface). In nylon-spandex blends: 40D–70D nylon filament is standard for premium performance feel. For cotton-spandex and modal-spandex blends: host fiber at 30s–40s Ne, spandex at 40D, yielding the soft-touch stretch constructions used in yoga wear and barre apparel.
Knit Construction
4-way stretch single jersey (warp + weft stretch): the primary construction for leggings, shorts, sports bras — provides full range of motion in all directions, produced on circular knit machines. 2-way stretch (weft-only stretch): used for some cycling shorts and tight-fitting tops where directional stretch is intentional design. Interlock with spandex: denser, more stable, used for sports bras and fitted tops requiring shape stability. Power net: open-mesh construction with spandex, used for support panels in sports bras and waistbands — provides high compression with ventilation. Warp knit (raschel/tricot): used for swimwear and technical athletic applications requiring high-tension compression and abrasion resistance.
Shrinkage
Polyester-spandex (typical activewear construction): length 2–4% after first machine wash at 40°C; width 1–3%. Nylon-spandex: similar range, 2–4% length, 1–3% width. Cotton-spandex: higher at 5–8% length shrinkage due to cotton component; requires pre-shrinking specification in tech pack. Spandex itself has near-zero shrinkage — observed shrinkage is from the host fiber. Specify pre-compacted fabric for cotton-dominant blends.
Pilling Resistance
Polyester-spandex 4-way stretch jersey: Grade 4–5 (Martindale, 2,000 cycles) — excellent pilling resistance from polyester's synthetic durability. Nylon-spandex: Grade 4–5, similar performance. Cotton-spandex: Grade 3–4 — acceptable for yoga wear and low-abrasion activewear; may pill at high-friction zones in running or HIIT applications. Modal-spandex: Grade 3.5–4 with bio-polishing — appropriate for yoga and low-impact activities.
Colorfastness
Polyester-spandex (disperse dyed): Wash (ISO 105-C06): 4–5/5. Light (ISO 105-B02): 5–6/8 (blue scale). Rubbing, wet: 3.5–4/5. Sweat (ISO 105-E04): 4–4.5/5 — specify this test explicitly for activewear since perspiration exposure is inherent to the application. Chlorine water (ISO 105-E03): 3–4/5 standard spandex; 4.5/5 LYCRA® XTRA LIFE or equivalent chlorine-resistant grade.
Tensile Strength
4-way stretch polyester-spandex (180 GSM): warp 280–340 N, weft 250–300 N (ISO 13934-1). Burst strength (ISO 13938-1, relevant for tight-fitting activewear): 350–500 kPa for well-constructed performance leggings. Seam slippage is a more common failure mode than fabric breakage in spandex activewear — require seam slippage test at >50 N per ISO 13936-1.
MOQ Guidance
Spandex-blend fabric at performance mills (India, Bangladesh, China): 500–1,000 meters per colorway standard minimum. LYCRA® certified mills may require 1,000+ meters minimum to qualify for brand certification. Garment MOQ: 300–500 pieces per SKU in India; 500–1,000 pieces in Bangladesh for commercial runs. Swim/chlorine-resistant spandex constructions: higher MOQ (800–1,500 meters) due to specialized yarn sourcing and finishing requirements.
Common Questions
Spandex (Elastane) for Activewear — answered.
Spandex for Activewear — answered.
Mechanical stretch (from fabric geometry alone) in woven or non-spandex knit textiles achieves 20–40% elongation with limited recovery — the fabric stretches with the body but does not spring back to original form consistently, producing the "bagging at knees and seat" failure mode that ruins activewear after 20–30 wears. Spandex's 500–800% elongation and 97–99% recovery is a fundamentally different elastic mechanism — the garment maintains its shape and compression profile throughout the use cycle. For fitted activewear at any price point where shape retention and body-conforming fit are design requirements, mechanical stretch alone is not a functional substitute.
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