# Nylon Yarn for Activewear **Fiber Guide · B2B Sourcing · Data-Driven** ## Nylon Yarn for Activewear. Nylon holds the highest tensile strength-to-weight ratio of any common apparel fibre — 40–60 cN/tex at 20–40 denier — making it the default choice when activewear must survive mechanical abuse that would degrade polyester in half the lifecycle. Its polyamide molecular structure absorbs 4–4.5% moisture (versus polyester's 0.4%), which translates directly into a softer skin feel during sustained physical exertion. Paired with spandex at typical 80–90% nylon / 10–20% spandex ratios, nylon fabrics deliver elongation of 50–70% with recovery rates exceeding 95% after 100 stretch cycles — critical for compression leggings, swimwear-crossover garments, and any activewear category where fit retention over time is the core product promise. --- ## At a Glance **The comparison, summarised.** | Dimension | Rating | Why | |---|---|---| | Softness / Hand Feel | 9/10 | Nylon's inherent moisture regain (4–4.5%) gives it a markedly softer, less synthetic feel than polyester at comparable denier. Micro-denier nylon (< 1 dpf) approaches the skin feel of natural fibres — a meaningful advantage for direct-skin activewear like sports bras and compression shorts. | | Durability / Abrasion Resistance | 10/10 | Best-in-class among synthetic apparel fibres. Martindale abrasion resistance of 30,000–50,000+ cycles versus polyester's 20,000. This matters in high-friction activewear: gym leggings at inner thighs, sports bra straps, performance shorts with continuous contact against equipment. | | Colour Retention / Colorfastness | 7/10 | Nylon's acid-dye affinity gives vibrant depth of shade, but UV light fastness (ISO 105-B02) is 3–4, noticeably below polyester's 5–6 with disperse dyes. Outdoor activewear in sustained sunlight exposure shows fading faster than polyester equivalents — important to communicate to sourcing teams specifying nylon for running or outdoor training categories. | | Breathability / Moisture Management | 7/10 | Nylon is moisture-absorbent, not hydrophobic — it wicks differently than polyester. It doesn't push moisture to the surface as fast (AATCC 195 moisture spread: 8–12 seconds vs < 5 for polyester) but distributes it more evenly, creating a less clammy feel. Engineering open-stitch constructions or mesh panels compensates for limited breathability in solid knits. | | Stretch & Recovery | 10/10 | Nylon-spandex combinations achieve 50–70% elongation with > 95% recovery after 100 cycles — the top performer in this dimension among all apparel fibres. The polyamide chain has higher fatigue resistance under cyclic stress than polyester, meaning the garment maintains compression and fit geometry significantly longer. | | Cost Efficiency | 5/10 | Nylon yarn costs USD 4.00–7.00/kg versus polyester's USD 2.50–4.00/kg — a 40–60% premium. For a standard 180 GSM nylon-spandex interlock, fabric cost per garment runs 30–50% higher than equivalent polyester-spandex. Justified for compression and high-abrasion applications; harder to justify for training tops or basic gym shorts where polyester performs adequately. | | Sustainability / Eco Credentials | 5/10 | Virgin nylon (nylon 6 or nylon 66) is petroleum-derived with high embodied energy. Recycled nylon — notably ECONYL from Aquafil, which recovers nylon from fishing nets and pre-consumer waste — offers a substantially improved profile and is increasingly mainstream in premium activewear positioning. | | Ease of Care / Wash Durability | 8/10 | Machine wash cold, no tumble dry at high heat (nylon softens above 70°C). Maintains shape and colour through 80+ wash cycles. More sensitive to high-temperature washing than polyester — clear care labelling is essential, particularly for blended constructions. | --- ## Why Nylon for Activewear **What makes nylon the right choice for activewear.** ### 01. Abrasion Resistance That Outlasts the Athlete's Gym Membership Nylon's polyamide molecular chain creates a fibre with a unique combination of hardness and elasticity that no other common apparel fibre replicates. Under the ASTM D4966 (Martindale) abrasion test, nylon fabrics routinely achieve 30,000–50,000 cycles before notable degradation, compared to 15,000–25,000 for comparable polyester constructions. Translated into product terms: an 80/20 nylon-spandex training short used five times per week will show minimal pilling or surface degradation at the 12-month mark, where a polyester-spandex equivalent may begin to pill at high-friction contact zones (inner thighs, seat panel) by month eight. This matters specifically in activewear categories with predictable friction patterns. Sports bras with under-band elastic, compression shorts with sustained thigh contact, gym leggings with seams under consistent mechanical load — these applications expose limitations in polyester that nylon absorbs without visible consequence. For brands competing in the mid-to-premium activewear tier where a 12-month durability promise is implicit in pricing, nylon at the critical abrasion points (even as a partial component in a multi-panel construction) is a legitimate engineering decision, not just a marketing distinction. ### 02. Stretch Recovery Under Cyclic Load — The Compression Garment Argument Compression garments are a technically demanding category. A legging or short making a compression claim must maintain its pressure gradient and silhouette geometry across hundreds of wear-wash-rewear cycles. This is where nylon's fatigue resistance under cyclic mechanical stress becomes the determining factor over polyester. At the molecular level, nylon's polyamide chains have greater resistance to permanent deformation under repeated elongation-recovery cycles than polyester's polyethylene terephthalate chains. In practical testing, an 80/20 nylon-spandex interlock retains > 90% of its original compression force after 100 wear-wash cycles. An equivalent 80/20 polyester-spandex interlock typically retains 80–85% after the same exposure. That 5–10% gap in compression retention translates directly into waistband tension, silhouette control, and the "like new" feel that separates a premium legging from one that needs replacing after six months. Specify nylon for any garment where compression retention is part of the product proposition. ### 03. Nylon 6 vs Nylon 66 — A Specification Decision Brands Get Wrong Most activewear brands source whatever "nylon" their mill offers without distinguishing between nylon 6 and nylon 66. This is a mistake, because the two polymer types have meaningfully different performance profiles in activewear applications. Nylon 66 (hexamethylene diamine + adipic acid) has a higher melting point (265°C vs nylon 6's 220°C), 10–15% higher tensile strength, and better heat resistance — advantages in performance fabrics that undergo heat-setting or are used in hot-climate outdoor applications. Nylon 6 (caprolactam-derived) is softer, slightly more pliable, dyes more uniformly with acid dyes, and is more forgiving in circular knitting due to its lower modulus. For most activewear applications — leggings, sports bras, training shorts — nylon 6 is the preferred choice: softer hand, better dye uptake, and adequate strength. Nylon 66 is the correct specification for performance applications requiring superior heat and abrasion resistance: outdoor climbing garments, competitive cycling shorts, any application involving sustained UV and friction exposure. Ask your supplier which type they're providing; they're not interchangeable and most won't volunteer the distinction. ### 04. ECONYL and Recycled Nylon — Premium Positioning That Actually Holds Up Technically ECONYL is Aquafil's brand name for recycled nylon 6, chemically regenerated from fishing nets, industrial waste nylon, and fabric offcuts back to virgin-equivalent caprolactam monomer. Unlike mechanical recycling (which degrades fibre quality), chemical regeneration produces nylon 6 that is functionally identical to virgin nylon 6 in tensile strength, elongation, dye uptake, and abrasion resistance. This is a critical distinction for brands making recycled-content claims: ECONYL-based nylon activewear fabric is not a "sustainability compromise" requiring trade-offs in performance. An ECONYL 80/20 nylon-spandex interlock will achieve the same Martindale rating, the same wash durability, and the same compression recovery as virgin nylon 6 equivalent. The premium is roughly 20–35% over virgin nylon 6 yarn price, which at a fabric level translates to USD 1.00–1.80/kg additional fabric cost — material but not prohibitive for brands in the ₹2,000+ retail price tier where sustainability positioning is a genuine purchase driver. ECONYL carries GRS (Global Recycled Standard) certification, which provides the chain-of-custody documentation needed for credible marketing claims. --- ## Technical Specifications **Manufacturing specs for nylon activewear.** **GSM Range** - Lightweight sports bras, under-layers: 150–180 GSM - Standard activewear (leggings, shorts, training tops): 180–220 GSM - Compression tights and supportive garments: 220–270 GSM - Swimwear-crossover and multi-sport constructions: 200–240 GSM Nylon is typically specified at a higher GSM than polyester for equivalent applications because the additional weight delivers better compression and more substantial hand feel. Avoid sub-150 GSM nylon-spandex knits for leggings — opacity becomes an issue and fabric integrity is marginal. **Yarn Count** - Fine denier nylon (sports bras, liners): 20D–40D semi-dull or bright, 24–34 filaments - Standard activewear (leggings, shorts): 40D–70D, 34–68 filaments - Heavier compression: 70D–140D, 48–136 filaments - Spandex component: 20D–40D bare or covered spandex (Lycra or equivalent) **Knit Construction** - 4-way stretch interlock: Industry standard for leggings and compression — even structure, minimal runs, good compression - Single jersey (nylon-spandex): Lighter training tops, sports bra inner layers - Warp knit (tricot, Raschel): Swimwear-crossover, high-elasticity performance fabrics — requires different machinery than circular knitting - Seamless circular: Growing category; nylon's stretch recovery makes it excellent for seamless constructions **Shrinkage** - Nylon 6 knit: 3–5% length, 2–3% width after first wash at 40°C - Nylon-spandex interlock: 4–6% length without heat setting; < 2% after proper heat setting at 170–180°C Heat setting is non-negotiable for nylon-spandex activewear. Confirm heat-setting temperature with your mill — nylon 6 heat-sets at 170–185°C (vs polyester at 180–190°C). Skipping heat setting is the single most common cause of size complaints on nylon leggings. **Pilling Resistance** - Nylon filament (warp or circular knit): 4–5 on Martindale scale - Nylon-spandex interlock (standard): 4 - Micro-denier nylon (< 1 dpf): 3–4 (finer filaments break more easily at surface, slightly more visible pilling than coarser grades) **Colorfastness** - Wash fastness (ISO 105-C06): 4–5 (acid dyes on nylon) - Light fastness (ISO 105-B02): 3–4 — this is a genuine limitation vs polyester's 5–6 - Rubbing fastness dry: 4–5; wet: 3–4 - Chlorine-water resistance (relevant for swimwear crossover): Specify chlorine-resistant spandex component; nylon fibre itself is moderately chlorine-resistant **Tensile Strength** - Nylon 6 filament: 40–55 cN/tex - Nylon 66 filament: 50–65 cN/tex - Nylon-spandex interlock (fabric level): Warp 180–250 N, Weft 150–220 N (ASTM D5034) **MOQ Guidance** - Standard 4-way stretch nylon-spandex interlock: 800–1,500 kg per colour (higher than polyester due to smaller mill base) - ECONYL-based construction: 1,000–2,000 kg minimum (Aquafil supply chain typically requires scale commitments) - Fine denier nylon for sports bras (< 30D): 500–800 kg - Warp knit constructions: 2,000–3,000 kg (specialist mills, longer setup) --- ## Manufacturing & Sourcing Considerations **What to know before you source.** **Knitting Machine Requirements** Nylon-spandex activewear is predominantly circular knit at 28–32 gauge for standard constructions. Finer gauges (32–36) are used for micro-denier swimwear-crossover fabrics. Warp knitting (tricot, Raschel) requires entirely different machinery and a specialist supply chain — few circular knit mills have warp knit capability. Seamless knitting (Santoni and equivalent) is growing for nylon activewear, particularly for sports bras — check mill capability specifically. Not all mills that claim seamless capability have adequate nylon-spandex experience. **Dyeing Compatibility** Nylon dyes with acid dyes (sulfonyl, milling, metal complex) in weakly acidic conditions at 95–105°C — fundamentally different from polyester's disperse dyeing at 130°C under pressure. This has important implications: (1) nylon cannot be sublimation-printed (a significant limitation versus polyester — see Trade-Offs); (2) nylon and polyester cannot be dyed in the same bath without specialised dual-dye approaches; (3) nylon has higher dye affinity than most other fibres, which means shade consistency between fabric batches requires tight pH and temperature control. Insist on duplicate lab dip approval before bulk dyeing — shade variation in nylon is real and difficult to correct post-production. **Finishing Processes** - Heat setting: Mandatory at 170–185°C for dimensional stability. Nylon is sensitive to temperature — over-setting (> 190°C) degrades tensile strength and causes yellowing. Under-setting leaves the garment prone to shrinkage. - DWR (Durable Water Repellent): Used on nylon for water-repellent active outerwear and wind layers. C6-DWR is the current standard following phase-out of PFOA-based C8 treatments. - Softener: Silicone-based softeners enhance hand feel but use sparingly — excess silicone reduces moisture management. Amino-silicone at 1–2% concentration is the standard. - Anti-UV: For outdoor activewear, UV absorber treatments (benzotriazole-based) can boost light fastness rating from 3–4 to 4–5. Relevant for any garment positioned for outdoor running or cycling. **Quality Control Checkpoints** 1. Greige fabric inspection: Check denier consistency and knit structure evenness — nylon is more sensitive to yarn quality variation than polyester 2. Lab dip approval: Mandatory, minimum 2 rounds — nylon shade matching is harder than polyester 3. Heat-setting verification: Pull a 10cm x 10cm sample from each roll, mark, wash at 40°C, measure — anything over 2% length change indicates inadequate heat setting 4. Pilling test: Martindale at 5,000 and 10,000 cycles before bulk approval — identify construction issues early 5. Colorfastness: Wash and light fastness before shipping on any outdoor or UV-exposed application **Common Production Pitfalls** - Shade lot variation: Nylon's high dye affinity amplifies small process variations into visible colour differences between rolls. Require batch dyeing across full style allocation. - Spandex bare vs covered: Bare spandex is used in most nylon activewear — it's finer and softer. Covered spandex (air-covered or yarn-covered) provides better UV and chlorine resistance but changes the hand feel noticeably. Specify correctly for end application. - Temperature exceedance in dyeing: Acid dyeing above 105°C causes nylon strength loss and greying. Verify mill dyeing protocols if strength is critical. - Care label accuracy: Nylon is heat-sensitive — 40°C wash, no tumble dry high, no direct ironing. Wrong care instructions are a customer service problem waiting to happen. **Lead Times** - Standard nylon-spandex interlock, stock yarn: 50–65 days ex-factory - ECONYL or specialty recycled nylon: 65–80 days (additional raw material lead time) - Warp knit constructions or seamless: 75–90 days - Custom denier or filament count: 90–105 days **Key Sourcing Regions** - China (Fujian, Zhejiang, Guangdong): Largest nylon activewear fabric production base, most competitive pricing, broadest denier range - Taiwan: Strong on technical warp knit and precision circular knit for performance compression - Italy (Como district): High-end technical nylon fabrics; premium pricing, used by European performance and swimwear brands - India (Tirupur): Growing nylon capacity, particularly for domestic Indian brands; narrower construction range than China --- ## Trade-Offs — Honest Assessment **Every fibre has limits. Here's the full picture.** ### Strengths - **Unmatched abrasion resistance.** 30,000–50,000 Martindale cycles versus polyester's 15,000–25,000. In high-friction activewear categories — leggings, sports bras, compression shorts — nylon delivers a product lifespan advantage that compounds into lower return rates and better reviews. - **Superior stretch recovery for compression claims.** > 95% recovery after 100 wear-wash cycles in 80/20 nylon-spandex. For garments making compression or "second skin" claims, nylon's polyamide fatigue resistance is the engineering foundation the claim rests on. - **Softer hand feel than polyester at equivalent denier.** Moisture regain of 4–4.5% versus polyester's 0.4% gives nylon a less synthetic, more comfortable feel against skin during sustained exertion. This translates into measurable NPS differences for direct-skin garments. - **Excellent dyeability with deep, saturated colour.** Acid dyes on nylon produce rich colour depth with wash fastness of 4–5. For fashion-led activewear where colour richness matters, nylon outperforms polyester disperse dyeing visually. - **ECONYL delivers recycled-content claims with zero performance compromise.** Unlike mechanical recycling approaches, chemical regeneration produces nylon 6 equivalent to virgin in all performance metrics. Premium is real but justified for brands in the ₹2,000+ price tier. - **Outstanding compatibility with Lycra and quality spandex.** Nylon's surface chemistry bonds well with spandex — nylon-spandex composites have consistently better compression retention profiles than polyester-spandex at equivalent construction specs. ### Limitations - **UV light fastness is a real weakness.** ISO 105-B02 rating of 3–4 versus polyester's 5–6. For outdoor running, cycling, or any activewear with sustained UV exposure, nylon colours fade faster. Mitigation: UV absorber finishing can push this to 4–5 but adds cost; alternatively, position nylon for indoor or gym-focused use cases. - **Sublimation printing is incompatible.** Sublimation dye bonds to polyester at 180–210°C through a disperse dye mechanism that does not work on nylon's polyamide surface. Brands requiring all-over sublimation prints must use polyester — this is a hard constraint, not a work-around-able issue. For team kits and complex graphic activewear, nylon is the wrong fibre. - **Higher cost reduces margin flexibility.** At USD 4.00–7.00/kg versus polyester's USD 2.50–4.00/kg, nylon fabric costs 40–60% more. In a cost-sensitive activewear category (mid-market training wear, basics-led gym shorts), this premium is difficult to recoup at retail. The economics work at ₹2,000+ retail; they are strained below ₹1,500. - **Yellowing under chlorine and sunscreen.** Nylon can yellow with prolonged exposure to chlorine (pools) and certain UV-filtering compounds in sunscreens. For swimwear-crossover activewear — yoga by the pool, outdoor HIIT — specify chlorine-resistant spandex and communicate care requirements to the consumer. --- ## Cost Analysis **The economics of nylon for activewear.** **Yarn / Fabric Pricing (indicative, 2024–2025)** - Virgin nylon 6 yarn (70D/68F, standard activewear): USD 4.50–6.50/kg - Virgin nylon 66 yarn (equivalent grade): USD 5.50–7.50/kg (nylon 66 commands ~20% premium over nylon 6) - ECONYL recycled nylon 6 yarn: USD 5.50–8.00/kg (GRS-certified, 20–30% premium over virgin nylon 6) - Nylon-spandex 80/20 interlock (180–220 GSM): USD 7.00–11.00/kg fully finished fabric - Nylon-spandex for sports bras (fine denier, 150–180 GSM): USD 8.00–14.00/kg **Cost-Per-Garment Impact** A 200 GSM nylon-spandex interlock legging (100g finished fabric weight, both panels) at USD 8.00/kg fabric cost = USD 0.80 fabric cost per garment. Add CMT, trims (waistband, care label, tags), and finishing: total FOB in China or Taiwan at 1,000+ unit minimums is typically USD 8.00–14.00 per unit. Compare polyester-spandex equivalent: USD 5.00–8.00 FOB. The USD 3.00–6.00 per unit premium for nylon means the retail price needs to be ₹1,800+ before the margin math becomes comfortable. **Cost-Per-Wear Calculation** A nylon-spandex legging at ₹2,499 retail with 150 uses before noticeable degradation (conservative; well-spec'd nylon-spandex routinely reaches 200+): - ₹2,499 ÷ 150 uses = ₹16.70 per wear Compare polyester-spandex legging at ₹1,499 retail with 100 uses before compression degradation: - ₹1,499 ÷ 100 uses = ₹15.00 per wear The cost-per-wear difference is narrower than the retail price difference suggests — nylon's durability advantage partially offsets its cost premium. For brands making durability-based claims and selling to repeat-purchase customers, nylon's higher retail price with genuine longevity advantage is a defensible value proposition. **Comparison to Alternatives** - vs Polyester-spandex: 40–60% more expensive per kg. Polyester delivers 80–85% of nylon's performance at 60–70% of the cost — correct specification default for mid-market activewear - vs Modal-spandex: Similar pricing range (modal USD 5.00–8.00/kg) but modal has inferior stretch recovery and abrasion resistance — different positioning (softness/comfort over performance durability) - vs Recycled polyester (rPET): rPET is 25–35% cheaper than ECONYL at equivalent recycled-content certification; correct choice when sustainability + cost efficiency is the brief vs sustainability + premium performance **ROI for Brand Owners** Lower product return rates in compression categories (retention of fit and compression claim), higher NPS from durability, and premium pricing headroom from ECONYL sustainability positioning all support positive ROI for nylon versus polyester specifically in leggings, sports bras, and compression garments. For training tops and basic gym shorts, the ROI math typically does not favour nylon over polyester. --- ## Sustainability Profile **Environmental and ethical considerations.** **Carbon & Water Footprint** Virgin nylon 6 has an embodied carbon of approximately 7.9 kg CO₂e per kg of fibre — higher than polyester (5.5 kg CO₂e/kg) and significantly higher than cotton (5.9–8.0 kg CO₂e/kg including agriculture). The higher carbon cost comes from the energy-intensive caprolactam production process. Water use is lower than cotton (no irrigation), but nylon production requires significant chemical inputs. ECONYL recycled nylon reduces embodied carbon to approximately 3.5–4.5 kg CO₂e/kg — a 40–45% improvement over virgin — while maintaining identical performance. **Available Certifications** - OEKO-TEX Standard 100: Achievable and increasingly standard for nylon activewear fabrics. Tests for residual monomers and processing chemicals that can remain in synthetic fabrics. - GRS (Global Recycled Standard): Required for ECONYL or any recycled nylon content claim. Provides chain of custody from waste source to finished fabric. - bluesign: Covers chemical, water, and energy management at the mill level. Increasingly required by premium brands sourcing nylon in Europe. - REACH compliance: Mandatory for EU sales — relevant for nylon as certain adipic acid derivatives require monitoring. - Aquafil ECONYL brand partnership: Brands using ECONYL can access Aquafil's Regeneration Program marketing toolkit, which provides documented supply chain transparency to support marketing claims. **Biodegradability / End-of-Life** Standard nylon does not biodegrade meaningfully in landfill — polyamide chains degrade over decades under appropriate microbial conditions that landfills rarely provide. ECONYL's chemical recycling model offers a genuinely circular pathway: ECONYL nylon can be regenerated back to monomer repeatedly without quality loss. For brands building circular product lines, ECONYL provides a more defensible circularity story than any recycling pathway available for polyester. **Consumer Perception** In the premium activewear segment (₹2,000+ retail), sustainability credentials are increasingly purchase-relevant, particularly for the 25–40 female demographic that dominates leggings and sports bra sales. ECONYL specifically has strong brand recognition in this segment through partnerships with Adidas, Lululemon, and premium swimwear brands. Sourcing ECONYL-based nylon activewear places a brand in credible company for sustainability positioning, with GRS certification providing the documentation to back it up. --- ## FAQ **Nylon for activewear — answered.** **1. What makes nylon better than polyester for activewear leggings specifically?** For compression leggings, nylon outperforms polyester on the two metrics that define the category: abrasion resistance (30,000–50,000 Martindale vs polyester's 15,000–25,000) and compression retention after cyclic stress (> 90% force retention after 100 wash-wear cycles vs polyester's 80–85%). Translated: a nylon legging holds its shape and compression claim for roughly 30–50% longer than a polyester equivalent. This matters less for casual gym shorts where compression isn't the product premise. The cost premium (40–60% higher per kg) is justified for compression leggings; it's harder to justify for training tops where polyester performs adequately. **2. What's the minimum order quantity for nylon activewear fabric?** For standard 80/20 nylon-spandex interlock in stock constructions (180–220 GSM), MOQs at major Fujian mills range from 800–1,500 kg per colour — approximately 5,000–9,000 metres of 150cm-wide fabric. That translates to roughly 4,000–7,000 pairs of leggings depending on pattern efficiency. ECONYL-based constructions require 1,000–2,000 kg minimum. Smaller brands can access nylon fabrics through Tirupur fabric traders at 300–500 kg minimums, at roughly 15–20% price premium over mill-direct. Budget-stage brands should consider fabric sourcing from stock-program mills before committing to custom constructions. **3. How does nylon activewear perform after 50+ wash cycles?** Nylon-spandex interlock maintains structural integrity, colour, and compression performance reliably through 80–100 wash cycles at 30–40°C. Degradation modes in order of likelihood: (1) spandex fatigue starting around 60–80 washes, manifesting as reduced waistband tension — mitigated by specifying Lycra B or T400 rather than commodity bare spandex; (2) light UV-induced colour fading if garment is used outdoors without UV treatment — mitigated by anti-UV finishing; (3) surface pilling at high-friction zones in micro-denier constructions after 50+ washes. For durability-led positioning, specify filament nylon at 40D or coarser — finer filaments pill earlier despite better initial hand feel. **4. What GSM should I specify for nylon activewear?** Sports bras (body) and under-layers: 150–180 GSM — enough opacity and compression without excess weight. Training leggings (general fitness, yoga): 180–210 GSM. Compression tights (running, cycling, targeted compression): 220–260 GSM — the higher GSM is needed for compression force, not just aesthetics. Note that nylon-spandex at 180 GSM provides more compression feel than polyester-spandex at the same weight due to nylon's higher elastic modulus — you can sometimes achieve equivalent compression performance at 5–10 GSM lower than the polyester equivalent. **5. Is nylon suitable for all-over printed activewear?** No — this is a hard constraint. Sublimation printing (the standard for all-over activewear graphics) requires minimum 65% polyester content and does not work on nylon. Nylon can be printed using reactive printing, screen printing, or heat transfer vinyl, but none of these approaches deliver the unlimited colour depth, zero hand-feel impact, and flex-cracking resistance of sublimation on polyester. If all-over prints are core to the product line, use polyester. If solid colours and minimal graphic placement are standard, nylon is compatible with the printing methods available. **6. What certifications should I look for when sourcing nylon activewear fabric?** At minimum: OEKO-TEX Standard 100 for any brand selling into EU, UK, or US markets (tests for caprolactam residues and dyeing chemicals relevant to nylon). For recycled content claims: GRS (Global Recycled Standard) with full chain of custody — ECONYL carries this by default. For premium positioning: bluesign at the mill level. If sourcing for brands requiring Higg MSI transparency reporting (increasingly requested by major retailers), ask your mill for Higg Facility Environmental Module scores. Do not accept mill self-declaration on recycled content — require GRS certificate numbers with expiry dates you can verify independently. **7. How does nylon handle the odour problem common to synthetic activewear?** Nylon has a more favourable odour profile than polyester due to its higher moisture regain (4–4.5% vs polyester's 0.4%). The polyamide surface chemistry is less hospitable to the bacteria responsible for isovaleric acid (the primary sweat odour compound) than polyester's smooth hydrophobic surface. In consumer testing, nylon activewear consistently scores better on odour perception than equivalent polyester after the same use conditions. That said, untreated nylon still accumulates odour under sustained high-sweat conditions — anti-microbial finishing (silver-ion or zinc pyrithione) is standard practice for performance-positioned nylon activewear. Budget USD 0.25–0.50/kg for anti-microbial finishing on any nylon activewear intended for high-intensity use. **8. What's the typical lead time for nylon activewear from order to delivery?** Standard nylon-spandex interlock in stock yarns: 50–65 days ex-factory from confirmed purchase order (covering knitting, dyeing, finishing, cutting, sewing, QC). Add 15–20 days sea freight to India from China. ECONYL or specialty recycled nylon: allow 65–80 days ex-factory (raw material has additional supply chain steps). New construction development (new knit structure or denier combination): 80–100 days. Budget your production calendar at 90 days total door-to-door for standard nylon activewear. Nylon lead times are typically 5–10 days longer than equivalent polyester due to smaller mill base and more complex dyeing process. --- ## Related Links **Related Applications for Nylon** - [Nylon for Sportswear](/yarn/nylon/sportswear) - [Nylon for Athleisure](/yarn/nylon/athleisure) - [Nylon for Underwear & Basics](/yarn/nylon/underwear-basics) **Alternative Fibers for Activewear** - [Polyester for Activewear](/yarn/polyester/activewear) - [Modal for Activewear](/yarn/modal/activewear) - [Merino Wool for Activewear](/yarn/merino-wool/activewear) - [Tri-Blend for Activewear](/yarn/tri-blend/activewear) - [Spandex for Activewear](/yarn/spandex/activewear) **Glossary** - [Denier](/glossary/denier) - [Pilling](/glossary/pilling) - [Colorfastness](/glossary/colorfastness) **Compare** - [Compare Nylon vs Other Fibers](/compare/nylon)