What Type of Fabric Is This? A Sourcing Guide for Custom Sportswear Buyers

When you hold a garment and ask, “what type of fabric is this?” you’re not just satisfying curiosity—you’re assessing performance, cost, and customizability. For brands, gyms, and wholesale buyers, understanding fabric composition and construction is critical to making informed sourcing decisions. The wrong material can lead to returns, poor branding results, and failed product lines. The right choice ensures durability, comfort, and a premium feel that reflects your brand. This guide breaks down the common fabric families used in activewear, translating textile terminology into actionable intelligence for your next custom order.

We’ll move beyond vague terms like “cotton” or “polyester” to examine fabric construction (knit vs. woven), key material blends, and the practical implications for OEM/ODM manufacturing. Whether you’re evaluating a sample or specifying a new product, this article equips you with the framework to communicate precisely with your factory and select the optimal textile for your target market and use case.

The Fundamental Divide: Knit vs. Woven Construction

The first and most critical question in identifying a fabric is its construction method. This dictates its stretch, drape, durability, and suitability for different garments. All activewear falls into one of these two categories.

More advice: Select Brillant Super Fabric: A Complete Sourcing Guide for Custom Sportswear

Knit Fabrics: The Stretch and Comfort Choice

Knits are made by interlocking loops of yarn. This structure gives them inherent stretch and softness, making them the dominant choice for most activewear tops and bottoms.

Jersey: The most common knit. Single jersey is flat on one side, ribbed on the other (used for t-shirts, tank tops). Double jersey (or interlock) is thicker and reversible, ideal for premium tees and lightweight hoodies. Its stretch is moderate, primarily in one direction.
Rib Knit: Features vertical ridges (ribs). Highly stretchy and recoverable, used for cuffs, waistbands, and form-fitting tops. 1×1 rib is standard; 2×2 rib is heavier and more stable.
French Terry: A looped fabric on one side (like terry cloth) and a smooth face on the other. Highly breathable and absorbent, perfect for mid-layer sweatshirts and light hoodies. The looped side provides texture and moisture wicking.
Fleece: A brushed knit, usually polyester, with a deep, soft pile. It’s insulating, lightweight, and quick-drying. The quality is defined by the pile height, density, and anti-pilling treatment. 纺织学会 provides standards for testing fleece durability.
Performance Knits (e.g., Ponte, Scuba): Heavier, stable knits with minimal stretch. They hold structure well, used for athleisure sets, joggers, and structured leggings. Often a polyester/rayon/spandex blend.

Woven Fabrics: The Structure and Durability Choice

Wovens are created by interlacing two sets of yarns (warp and weft) at right angles. They have minimal stretch unless blended with elastane (spandex/Lycra). They are generally more durable and wind-resistant than knits.

Plain Weave (e.g., Cotton Twill, Oxford): The basic over-under pattern. Twill (like in cargo pants) has a diagonal rib, making it durable and resistant to wrinkles. Oxford is a basketweave, breathable and casual.
Canvas/Heavyweight Twill: Extremely durable, used for heavy-duty cargo pants, workwear, and outerwear shells. Low stretch, high abrasion resistance.
Ripstop: A woven fabric reinforced with thicker yarns at regular intervals in a grid pattern. This prevents tears from spreading. A staple for tactical pants, backpacks, and performance outerwear.
Softshell: A woven fabric, typically polyester, with a durable water-repellent (DWR) finish and often a fleece backing. It’s wind-resistant, breathable, and flexible, used for jackets and pants in mild conditions.

Key Fiber Blends and Their Sportswear Applications

Once you know the construction, the fiber content tells you about performance, feel, and cost. For custom manufacturing, blends are almost always the rule, not the exception.

Common Activewear Fiber Blends: Properties & Sourcing Notes
Blend	Key Properties	Typical Use Cases	Sourcing & Production Notes
100% Cotton (Combed/ Ringspun)	Soft, breathable, natural feel. Poor moisture management, shrinks, wrinkles.	Basic tees, casual sweatshirts. Lower-end activewear.	Low cost, easy to print. Not suitable for performance. Pre-shrunk fabrics are a must.
Cotton/Polyester (e.g., 60/40, 50/50)	Balances cotton’s feel with polyester’s durability, wrinkle resistance, and faster drying.	Classic crewnecks, hoodies, casual joggers. Broad market appeal.	The workhorse blend. Very consistent quality available. Price point is moderate. Good for all-over printing.
Polyester/Spandex (e.g., 92/8, 88/12)	High stretch & recovery, moisture-wicking, quick-dry, durable. Can feel synthetic.	Leggings, form-fitting tops, performance shorts, fitted track pants.	Requires precise knitting to avoid “spandex creep”. High-quality recovery is key. Ask for fabric samples with wash tests.
Polyester/Recycled Polyester	Performance identical to virgin polyester. Eco-premium story. Slightly higher cost.	All high-performance apparel, sustainable brand lines.	Verify certification (e.g., GRS). Supply chain traceability is a key buyer question. MOQs can be higher for specific recycled content.
Nylon/Spandex	Lighter, silkier feel than polyester. Excellent abrasion resistance. Quick-dry.	Swimwear, dancewear, high-end yoga, lightweight outerwear.	More expensive than polyester. Excellent for dye-sublimation printing. Sensitive to high heat.
Tri-Blend (Cotton/Poly/Rayon)	Ultra-soft, vintage drape, heather look. Poor moisture-wicking, less durable.	Fashion-forward basics, vintage-style tees, loungewear.	Printing can be tricky due to fabric texture. Dye consistency is crucial for heather effect. Lower durability—factor into pricing.

Performance Finishes: The Hidden Layer of Function

Many performance attributes aren’t from the fiber itself but from chemical finishes applied to the fabric. When sourcing, you must confirm these treatments are present and durable.

Moisture-Wicking: Typically a hydrophobic (water-repelling) finish on polyester. Ask: “Is it a treatment or inherent to the yarn?” Treatments can wash out over time.
Antimicrobial/Anti-Odor: Often silver-based or using other agents. Crucial for high-sweat apparel. Verify wash durability claims (e.g., “lasts 50 washes”).
UV Protection: Measured by UPF rating. Some synthetics inherently block UV; others need a finish. Essential for outdoor workwear and team uniforms.
DWR (Durable Water Repellent): Makes fabrics water-resistant. Used on softshells and hard shells. It’s a coating that degrades and requires reapplication (or a durable factory finish).
Anti-Pilling: A finish on fleece and brushed fabrics to prevent surface fuzz. Vital for maintaining a premium look. AATCC testing methods (like Test 123) are the industry standard for pilling evaluation.

What to Communicate to Your Factory: A Buyer’s Checklist

Vague requests lead to sample failures. Use this checklist to define your fabric requirements clearly for your OEM/ODM partner.

Garment Type & Function: “I need a fabric for a high-intensity training zip-up hoodie” vs. “a casual weekend hoodie”. This dictates knit type, weight (GSM), and stretch.
Target Price Point: Be upfront about your cost target. This immediately narrows the fabric library to feasible options (e.g., 100% cotton vs. tri-blend vs. performance knit).
Specific Fabric Name or Code: If you have a reference garment, request the same fabric construction. “I want a 280GSM French Terry, 80% cotton/20% polyester, brushed loopback.”
Required Certifications: OEKO-TEX Standard 100 (harmful substances), GRS (recycled content), Bluesign (sustainable chemistry). State these upfront.
Performance Requirements: List must-haves: “Must have moisture-wicking finish,” “minimum UPF 30,” “anti-pilling grade 3.5+.”
Print/Embroidery Compatibility: Specify your decoration method. Some fabrics don’t take screen printing well (e.g., high-stretch, textured heathers). Ask the factory for their recommended fabric-print pairing.
Wash & Care Standards: “Must withstand 50 industrial wash cycles without significant shrinkage or pilling.” This forces the factory to select a robust fabric and finish.
Sample Requirements: Request a fabric swatch and a made-up sample garment. Test the sample: stretch it, wash it, feel it. Do not approve bulk production based on a small cut of fabric alone.

Trade-offs and Production Realities

Every fabric choice involves compromise. Understanding these trade-offs is where strategic sourcing happens.

Cost vs. Performance: Natural fibers (cotton) are often cheaper per meter but may cost more long-term in durability. High-tech synthetics (Nylon/Spandex) have a higher upfront cost but can justify a premium retail price and lower return rates.
MOQs and Custom Knits: Standard fabrics (like a 32/1 180GSM cotton jersey) have low MOQs and are readily available. Custom-knit fabrics (specific GSM, unique blends, special finishes) often require higher MOQs (e.g., 3,000-5,000 meters) and longer lead times due to yarn sourcing and mill setup.
Eco-Claims vs. Reality: “Recycled” or “organic” claims require certification. A factory can source non-certified “recycled” polyester cheaper. Always ask for the certificate number and verify it with the issuing body.
Dyeability: Natural fibers (cotton, rayon) dye easily and vibrantly with reactive dyes. Polyester requires disperse dyeing (higher temperature, different process). Blends can result in heather effects or uneven dye uptake. This affects your color development process and cost.

From Question to Action: Your Next Steps

Now that you can dissect a fabric’s construction and composition, apply this lens. When a supplier sends a swatch, don’t just feel it. Ask: Is it knit or woven? What’s the GSM? What’s the exact fiber content and yarn count? What finishes are applied? Request the mill’s technical datasheet.

For your custom order, start by defining the garment’s purpose and user. A basketball team’s jersey needs lightweight, breathable, 100% polyester mesh with moisture-wicking. A luxury loungewear brand needs a heavy, soft, cotton-rich fleece with a anti-pill finish. The answers to “what type of fabric is this?” are the building blocks of a successful product.

If you’re looking to source or customize any of the styles mentioned above, our factory offers low MOQ OEM/ODM production with full sampling support. Get a free quote today.