Starting an activewear line comes with unique fabric sourcing challenges. Small brands often struggle with high minimum order quantities (MOQs), limited supplier options, and ensuring consistent quality on a budget. Sourcing performance textiles in low volumes can be daunting, especially without established supplier relationships.
Meanwhile, consumer demand for high-performance fabrics is at an all-time high. Even boutique fitness brands are expected to offer materials that are moisture-wicking, stretchy, and durable. Balancing these technical requirements with design vision and cost constraints is a common hurdle. The following guide addresses these challenges and breaks down everything from technical specs to selecting the right fabric for each application.
Technical Specifications
Understanding fabric specs is crucial for comparing materials:
- Weight (GSM) – Grams per square meter indicates fabric weight/thickness. Activewear typically ranges from lightweight 150 GSM for breathable tops to heavier 300+ GSM for compressive leggings. Evaluate GSM to ensure your fabric isn’t too flimsy or overly thick for its purpose.
- Stretch & Recovery – Determine if the textile has 2-way or 4-way stretch and the percentage of spandex/Lycra. High stretch (e.g. 15–20% spandex) offers greater flexibility for movement, but also test recovery (how well it snaps back to shape).
- Fiber Composition – Common activewear blends include polyester-spandex and nylon-spandex for their strength and moisture management. Natural blends like cotton spandex fabrics add softness but retain sweat, so use them strategically (more on that later).
- Moisture-Wicking & Breathability – Look for technical finishes or fiber properties that draw sweat away from skin. Many polyester knits are engineered to be quick-drying, an essential for gymwear. Check if the supplier provides wicking tests or breathability ratings.
- Durability Factors – Inquire about pilling resistance, abrasion tests, and colorfastness. Performance wear endures a lot of stress (stretching, frequent washing), so fabric should hold up. Also verify if the material is pre-shrunk or stabilized to avoid surprises after production.
| Fabric (example construction) | Typical weight (GSM) | Typical stretch % (4-way) | Fiber content (common) | Moisture-wicking capability | Ideal uses |
|---|---|---|---|---|---|
| Nylon–Spandex Tricot (warp knit, smooth “legging” face) | 220–320 | 60–100% (length) / 40–80% (width) | 75–85% nylon / 15–25% spandex | High (often excellent with wicking finish) | Leggings, bike shorts, sports bras, compressive sets (sleek, durable, squat-proof potential) |
| Polyester–Spandex Jersey (weft knit, soft hand, “tee” knit) | 160–250 | 40–80% / 30–60% | 80–92% polyester / 8–20% spandex | High (poly is naturally quick-dry; finishes help) | Tops, lighter leggings, bras, base layers (soft + breathable; can show sweat depending on color) |
| Recycled Polyester Blends (often RPET + spandex; interlock or jersey) | 180–280 | 40–75% / 30–60% | 75–90% recycled poly / 10–25% spandex (sometimes nylon/rPET mixes) | Med–High (depends heavily on yarn + finish) | Leggings, bras, tops where sustainability story matters; performance can be excellent but varies by supplier |
| Nylon–Spandex Rib (rib knit, textured) | 240–360 | 60–110% / 40–90% | 70–85% nylon / 15–30% spandex | Med–High | Seamless-look sets, bras, shorts (texture hides lines; great recovery if spec’d well) |
| Polyester Interlock / Double Knit + Spandex (more stable, smoother) | 200–300 | 35–70% / 25–55% | 80–92% poly / 8–20% spandex | High | Training tops, midweight leggings, outer/base layers (more opacity + structure than jersey) |
| Soft “Peached” Nylon/Poly + Spandex (brushed/peached finish) | 200–280 | 50–90% / 35–70% | nylon or poly base + 10–25% spandex | Med–High | Yoga/lounge leggings, bras (butter handfeel; check pilling resistance) |
| Woven Stretch (Nylon/Poly + Elastane) (mechanical + elastane) | 120–220 | 10–30% / 10–25% (less than knits) | 85–95% nylon/poly / 5–15% elastane | Med | Outer layers: running shorts, windbreakers, lightweight joggers (structure, abrasion resistance) |
contrast knit fabrics (most activewear textiles) with woven stretch fabrics (structured fabrics with spandex, used in things like training shorts or jackets). Highlight that knits generally provide 4-way stretch and comfort, whereas woven options offer a more structured fit with limited stretch, suitable for certain outerwear or durability needs.
How to Choose Fabric by Project Type
Different activewear projects have distinct fabric needs. Define your requirements by end use:
- High-Intensity Gymwear: Prioritize stretch and moisture management. For training leggings or CrossFit apparel, opt for nylon or polyester knits with high spandex content (e.g. 20% spandex) for 4-way stretch. Ensure the fabric has excellent sweat-wicking and squat-proof opacity. Compression fabrics (with strong recovery) can provide muscle support. Avoid anything prone to sagging or heavy when soaked with sweat.
- Swimwear & Water Sports: Look for chlorine-resistant and quick-dry Nylon-Spandex tricot (e.g. 80% nylon, 20% spandex) is a common swim fabric due to its smooth fit and stretch. Make sure to include a proper lining layer for modesty and support – see our lining fabric collection for specialized swim linings that won’t degrade in chlorine. Fabrics should also have excellent shape retention to handle being wet without stretching out.
- Yoga & Athleisure: Emphasize comfort and breathability for low to mid-impact activities. Soft cotton spandex fabrics or poly/cotton blends are popular for yoga pants and lounge leggings because they’re gentle on skin. These fabrics provide a natural feel and sufficient stretch for flexibility. Note: Cotton blends are breathable but hold moisture, so they’re best for light workouts or casual wear rather than intense cardio.
- Outerwear & Layering Pieces: For jackets, windbreakers, or training shorts, consider durability and structure. Lightweight ripstop or woven stretch fabrics with a bit of spandex offer flexibility while maintaining form. These are ideal when you need a tougher exterior (e.g. for outdoor running jackets) that still allows movement. Ensure any fabric for outerwear has the necessary finishes (water-repellent coating for windbreakers, UV protection for sun-exposed gear, etc., if needed).
Common Mistakes to Avoid
Sourcing fabrics can be a learning curve. Here are some pitfalls small activewear brands should avoid, presented as a checklist:
- Ignoring MOQs: Falling in love with a fabric only to find the supplier’s minimum order is far beyond your needs. Always ask about MOQs upfront to avoid wasted sampling efforts.
- Skipping Fabric Testing: Not ordering swatches or sample yardage to test performance is a big mistake. Always wash, stretch, and wear-test fabrics before committing to bulk. This helps catch issues like excessive shrinkage, color bleeding, or discomfort against skin.
- Choosing Style Over Function: Selecting a fabric for its print or look without considering technical performance. For example, a cute patterned jersey might lack the stretch recovery needed for active leggings. Ensure the fabric’s properties align with the garment’s function (e.g. sweat-wicking for gym tops, compression for shorts, etc.).
- Overlooking Supplier Credibility: Sourcing “cheap” fabric from an unknown mill can backfire. Watch out for red flags such as inconsistent quality between batches, lack of certificates (like moisture-wicking or sustainability certifications), or poor communication. It’s worth paying a bit more for a reliable supplier with good reviews.
- Not Planning for Lining or Layers: Forgetting about complementary materials like linings, elastics, or mesh can derail production. Ensure you source matching trims and supportive linings alongside your main fabric, so color and stretch are compatible.
When to Use Recycled Polyester (as an Alternative Fabric)
Recycled polyester has emerged as a popular alternative to traditional polyester in activewear. This section explains when and why to opt for recycled poly:
- Sustainability Goals: If your brand emphasizes eco-friendliness, recycled polyester is a go-to choice. It offers the same performance as virgin polyester – moisture-wicking, durability, stretch when blended with spandex – but with a lower environmental footprint. Use it to appeal to environmentally conscious consumers without sacrificing quality.
- Use Cases: Recycled poly blends work well in nearly all activewear categories, from leggings to sports bras. It’s ideal when you want to replace standard polyester one-to-one. For instance, a 85% recycled poly / 15% spandex jersey can perform just like the conventional version in a gym shirt or cycling short.
- When to Consider Alternatives: While recycled poly is versatile, consider availability and cost. Sometimes recycled fabrics have higher MOQs or slightly higher prices. Use them when you can meet the order size and when their properties meet your needs. For extremely compression-focused garments, ensure the recycled yarn has the necessary strength and recovery (modern recycled PET yarns typically do).
- Quality Assurance: Treat recycled poly sourcing like any other fabric – request sample yardage and test it. Verify any claims (e.g. “made from 100% post-consumer waste”) and look for certifications like Global Recycled Standard (GRS) if sustainability is a key marketing point for your brand.
Overall, recycled polyester is best used when you want to combine performance with sustainability. It’s an excellent alternative for most activewear projects, helping your small brand stand out with an eco-conscious story.
Conclusion
Fabric sourcing is a foundational step for any small activewear brand. By understanding technical specifications and aligning fabric choices with your specific product needs, you set your collection up for success. Always start with clear performance requirements – whether it’s extreme stretch for gym leggings or chlorine resistance for swimwear – and use those criteria to evaluate potential materials. Avoid common pitfalls by thoroughly testing fabrics and vetting suppliers before you commit.
In summary, an informed approach to fabric sourcing for activewear brands will save time, money, and hassle in the long run. With the right fabric in hand, even a small brand can deliver professional-grade activewear that rivals the big players. Use this outline as a roadmap to navigate the sourcing process confidently, ensuring every yard of fabric you buy brings you one step closer to a high-quality, functional, and successful product line.