Knit vs Woven Fabric: A Manufacturer's Guide for Sportswear Buyers

When sourcing custom activewear, the fundamental choice between knit and woven fabric dictates everything from the garment’s feel and function to its production feasibility and cost. This isn’t just a stylistic decision; it’s a technical one that affects fit, durability, decoration methods, and how your final product performs for the athlete, gym-goer, or casual wearer. Understanding these core differences is essential for specifying the right garment for your brand and ensuring a smooth manufacturing process.

As a buyer or brand owner, you’re not just choosing a texture—you’re selecting a construction method. Knits, made from interlooped yarns, offer inherent stretch and comfort. Wovens, created by interlacing yarns at right angles, provide structure and durability. The optimal choice depends entirely on the specific apparel item you’re developing and its intended use case.

This guide breaks down the knit vs. woven debate from a production and sourcing perspective. We’ll compare their properties side-by-side, map them to common sportswear categories, and outline the critical specifications you need to communicate to your manufacturer to get the custom garment you envision.

Quick Comparison: Knit vs. Woven for Sportswear

Before diving into details, here’s a high-level orienting summary of how these two fabric constructions typically apply to activewear.

Feature	Knit Fabric	Woven Fabric
Construction	Interlooped yarns (like knitting by hand)	Interlaced yarns in a grid (like weaving on a loom)
Primary Trait	Stretch & Flexibility	Stability & Structure
Common Sportswear Examples	T-shirts, hoodies, sweatshirts, leggings, tank tops	Cargo pants, woven shorts, track jackets (shells), performance shirts (non-stretch)
Feel & Drape	Softer, more fluid, body-hugging	Crisper, more rigid, holds shape
Durability Focus	Resists tearing, but can snag; prone to shrinkage	Highly abrasion-resistant, stable dimensions, less shrinkage
Decoration Suitability	Excellent for screen printing, embroidery (needs stabilization)	Excellent for all methods; stable surface is easier for precise prints
Key Customization Variables	GSM (weight), yarn type (cotton, polyester, blend), knit stitch (jersey, fleece, rib)	Weave type (twill, plain, ripstop), GSM, yarn count, finishes (DWR, moisture-wicking treatment)

The Structural Difference: How They’re Built

Knit: The Loop System

In knitting, a single yarn is formed into a series of interconnected loops. This looped structure creates a fabric with natural elasticity in all directions (especially in weft knits, which are most common for apparel). The density of these loops is measured in GSM (grams per square meter), which directly correlates to the fabric’s weight, thickness, and opacity.

Common knit constructions for sportswear include:

Jersey Knit: The standard for t-shirts and tank tops. Smooth on one side, slightly textured on the other. Lightweight to mid-weight.
French Terry: Has loops on one side (the inside) and a smooth face. Highly breathable, used for hoodies and light sweats.
Fleece: A brushed, napped knit. Exceptionally soft and warm, the go-to for hoodies and sweatpants. Can be single-sided (polar fleece) or double-sided.
Rib Knit: Features vertical ridges. Extremely stretchy and recoverable, used for cuffs, waistbands, and fitted tank tops.

Woven: The Grid System

Weaving involves two sets of yarns: the warp (longitudinal, held tension) and the weft (crosswise, shot through the warp). This perpendicular interlacing creates a stable, non-stretchy grid. The pattern of this interlacing is the weave.

Key weave types for activewear are:

Plain Weave: The simplest, most basic grid (like a checkerboard). Creates a crisp, smooth fabric like poplin or canvas. Used for dress shirts and lightweight woven shorts.
Twill Weave: Creates a distinctive diagonal rib. Durable, drapes well, and hides soil. The weave behind denim, chino, and many cargo pants.
Ripstop: A reinforcement technique where thicker threads are woven into a plain or twill grid at regular intervals. This prevents tears from propagating, making it ideal for heavy-duty cargo pants and adventure outerwear.

Application Breakdown: Which Fabric for Which Garment?

In custom sportswear, the garment type is your primary guide. Here’s a practical breakdown for the most common categories you’ll be sourcing.

T-Shirts & Tank Tops

Almost exclusively knit. The need for freedom of movement and a comfortable, body-conforming fit makes jersey knit the universal standard. The key decision here is the GSM and fiber blend. A 180 GSM 100% cotton jersey will feel vastly different from a 140 GSM 60/40 cotton/polyester blend. For performance, you’d specify a moisture-wicking polyester jersey, which uses special yarns and possibly a different knit structure to enhance wicking. Woven fabrics here would be unusual and uncomfortable for this style.

Hoodies & Sweatshirts

Almost exclusively knit (French Terry or Fleece). Again, comfort and warmth are paramount. A fleece hoodie is a knit construction—the loops are brushed to create a pile. The weight (GSM, e.g., 280gsm vs. 380gsm) and whether it’s a single-jersey fleece or a double-sided loop-back are critical specs. A woven hoodie would be stiff, lack stretch at the hood and underarms, and feel like a blanket, not an activewear layer.

Cargo Pants & Joggers

This is where woven and knit diverge sharply, serving two different product lines.

Cargo Pants: Traditionally and functionally woven. You need the structure to hold multiple heavy pockets without sagging, the durability to resist abrasion from knees and seams, and often a DWR (Durable Water Repellent) finish. Twill (like cotton drill) or ripstop are typical. A knit cargo pant would likely stretch out and pocket contents would distort the fabric.
Joggers & Sweatpants: Traditionally and comfortably knit. Made from fleece or heavy French terry. They provide soft comfort, warmth, and ease of movement for recovery or casual wear. Some performance joggers use a lightweight, stretch-woven fabric with added elastane (e.g., a stretch twill), blurring the line, but the classic feel is knit.

Tracksuits & Jackets

Often a hybrid. The track jacket (the top) is frequently a woven shell (like nylon or polyester with a tight weave) to be wind-resistant and lightweight, sometimes with a mesh or knit lining. The matching track pants are often a knit (interlock or lightweight fleece) for comfort. This mismatch in fabric type is a key design and costing consideration for a full tracksuit set.

Production & Sourcing Implications

Your fabric choice has a direct impact on the manufacturing process, lead times, and customization capabilities.

Minimums & Lead Times

Woven fabrics often have higher minimum order quantities (MOQs) for custom production because they are typically produced on larger, more expensive looms. Knit fabrics, especially jersey, can be more readily available in smaller, pre-colored batches from mills, making them slightly more accessible for smaller brand runs or quicker turnarounds. However, this varies drastically by the specific mill and fabric specification.

Pattern Making & Cutting

Woven fabrics have no inherent stretch. Patterns must account for ease (extra room for movement) through clever cutting and design, not fabric give. Knit patterns can be more fitted because the fabric will stretch over the body. However, knit fabrics can be unstable when cut—they can distort or “grow” during sewing if not handled properly, requiring more skilled operators and sometimes a stabilizing stay-stitch.

Garment Decoration (Printing/Embroidery)

Both work well, but with nuances:

Screen Printing: Wovens provide a perfectly stable, flat surface, ideal for fine detail and multi-color prints. Knits (especially heavy fleece) can have a textured surface (naps) that may require a different ink (plastisol vs. water-based) or an underlay to get a crisp print.
Embroidery: The stiffness of a woven fabric often supports heavy embroidery without excessive puckering. Knits, particularly lighter ones, will require a stabilizer (a tear-away or cut-away backing) to prevent the fabric from stretching and distorting during the high-tension embroidery process. This is a standard step but adds a small cost and material consideration.
DTG (Direct-to-Garment) & Heat Transfer: Knits, with their soft surface, are generally preferred for these methods. Wovens can sometimes feel stiff or plastic-like after application if not done carefully.

What to Specify When Ordering Custom Sportswear

To get an accurate quote and the right fabric, you must move beyond “cotton” or “polyester.” Provide your manufacturer with these specific variables.

For Knit Orders:

Fabric Type: Jersey (specify single jersey, double jersey/interlock), Fleece (specify anti-pill, brushed), French Terry, Rib.
Fabric Weight (GSM): e.g., “180 GSM cotton jersey” or “320 GSM anti-pill fleece.” This is the single most important spec for feel and quality.
Fiber Composition: 100% Cotton, 60/40 Cotton/Polyester, 100% Polyester (for performance), or specific performance yarns (e.g., moisture-wicking, recycled PET).
Special Finishes: Garment-washed for softness, pre-shrunk, peached finish.

For Woven Orders:

Weave Type: Plain, Twill (specify 2/1, 3/1), Ripstop.
Fabric Weight (GSM or oz/yd²): e.g., “240 GSM ripstop polyester” or “9 oz cotton twill.”
Fiber Composition & Yarn Count: This affects strength and feel. A high yarn count means finer, smoother yarns.
Critical Finishes: DWR coating for water resistance, MOISTURE-WICKING treatment (often applied as a finish, not inherent to the yarn), soil release, UV protection. These must be explicitly requested.

Making the Decision: A Buyer’s Checklist

Use this list to evaluate your project requirements and guide your conversation with a potential manufacturing partner.

✓ Garment Purpose: Is it for high-mobility training (likely knit), rugged outdoor work (likely woven), or a fashion piece where drape is key?
✓ Desired Fit: Do you need a tight, compressive fit (stretch knit) or a relaxed, structured silhouette (woven)?
✓ Pocket Functionality: Will the pants carry heavy tools or phones? Woven fabrics hold pocket shape better.
✓ Climate & Season: Knits (fleece) for cold, woven (linen, lightweight ripstop) for hot. But note: lightweight performance knits also exist for heat.
✓ Decoration Method: Are you doing large, graphic prints (knit is fine) or intricate, small embroidery (woven is easier, knit needs stabilizer)?
Production Scale: For very small batches (e.g., <500 pieces), ask your manufacturer which fabric type they have in stock or can source with lower MOQs.
✓ Cost Target: Generally, basic 100% cotton jersey knits are very cost-effective. Heavy-duty woven ripstops with special finishes are at the higher end.

Final Questions Before You Source

Your manufacturer is your partner in this decision. Before finalizing your tech pack, ask:

“Given my garment type [e.g., lightweight hiking pants], do you recommend a knit or woven base fabric for the best balance of function and cost?”
“Can you provide fabric swatches with the exact GSM and composition I need, so I can approve the hand and weight?”
“For this knit fabric, what is the expected shrinkage percentage after wash? Do you pre-shrink it?”
“If I want a water-resistant cargo short, is it better to use a tightly woven nylon or a treated cotton? What are the trade-offs in breathability and durability?”
“What are the typical MOQs for the woven twill vs. the knit fleece I’m considering?”

Answering these questions with your supplier will eliminate guesswork and ensure your custom activewear line performs as intended, from the first sample to the final bulk shipment.

Planning to add these styles to your collection? We produce custom versions with your branding, fabric choice, and sizing — from sample to bulk. Contact our team for details.