Textile 101
The foundation for performance materials — fibers, yarns, and the structures they become. Everything here is groundwork for the rest of the field notes.
What Is a Textile?
Every textile — no matter how technical — comes from the same three-step chain. A fiber gets twisted or spun into a yarn, and that yarn becomes a fabric: woven, knit, or bonded into a nonwoven.
Everything downstream — strength, stretch, moisture management, durability — traces back to choices made at each of these three steps.
- Wovens interlace two sets of yarns at right angles — strong, stable, structured.
- Knits interloop a single system of yarns — stretchy, soft, flexible.
- Nonwovens bond fibers directly, without weaving or knitting — light, cheap, less durable.
Fibers: Natural vs. Synthetic
Fibers are the smallest unit in any textile — the raw material underneath every yarn and fabric. Nearly every performance trait a fabric has, it inherits from the fiber itself: strength, stretch, moisture-wicking, thermal regulation, softness.
Blending fibers is how those traits get tuned — nylon for strength, spandex for stretch, combined into one yarn.
- Natural — cotton, wool, silk.
- Synthetic — polyester, nylon, spandex.
- Staple fibers — short and fuzzy (cotton, wool, chopped polyester).
- Filament fibers — long and smooth (silk, extruded polyester).
Bonus: Fiber Cross-Sections
Slice a fiber in half and its shape tells you a lot — cross-section engineering is how the same base polymer ends up feeling, looking, and performing completely differently.
Cotton's irregular shape gives it a soft, matte, breathable hand. Polyester, being extruded, can be engineered into whatever shape the job calls for.
Yarn Construction Types
Fibers become yarn in a handful of standard ways, and each construction method leaves a fingerprint on how the finished fabric feels and behaves.
Reading a Yarn Spec
Every yarn on a spec sheet compresses into a short code — plies, denier, filament count. Once you know the pattern, you can read the fabric's behavior straight off the label.
- Number of Ends
- How many individual filaments are bundled into the yarn. More ends = bulkier, with more body and coverage.
- Denier (D)
- Linear mass density. Higher denier = thicker, heavier yarn; lower denier = finer, lighter yarn.
- Ply
- The number of individual yarns twisted together to form one thicker yarn.
- Covered Yarns
- A core yarn — typically spandex or elastane — wrapped in another yarn for comfort and performance.
- ATY vs. DTY
- Air-Textured Yarn is air-entangled, soft, cotton-like. Drawn Textured Yarn is mechanically crimped, smooth and sleek — better for performance wear.
2×75D/2/72F Polyester + 1×140D Spandex
2/78/68 Crimp Polyamide
1/8/36 Recycled Polyester
Wovens, Knits & Nonwovens
Once yarn exists, there are exactly three ways to turn it into fabric — interlace it, interloop it, or bond it directly. Each produces a fundamentally different material.
Woven
Two sets of yarns — warp and weft — interlaced at 90° on a loom. Strong, stable, holds its shape. Ideal for structured garments and durable applications.
Knit
Yarns interlooped in rows, creating stretch and flexibility. Soft, comfortable, warm — the default for t-shirts, leggings, sweaters.
Nonwoven
Fibers bonded together — mechanically, chemically, or thermally — with no knitting or weaving. Lightweight and inexpensive, but less durable and less stretchy. Wipes, filters, soft accessories.
GO DEEPER: STRUCTURAL VARIATIONS +
WOVEN STRUCTURES
- Biaxial — 0°/90° interlace, strong and stable.
- High Modulus — stiff yarns for high-strength applications.
- Multilayer — stacked woven layers for added structure.
- Triaxial — 0°/+60°/−60° interlace, more isotropic strength.
BRAIDED STRUCTURES
- Tubular — diagonal interlace forms a seamless tube.
- Tubular, Laid in Warp — tubular plus lengthwise reinforcement.
- Flat — same braiding, flat profile — tapes and straps.
- Square — denser, square cross-section.
- 3-D — full 3D interlacing, near-solid shapes.
KNITTED STRUCTURES
- Weft Knit — horizontal loops, stretchy and soft.
- Weft Knit, Laid in Weft/Warp — extra yarns laid flat for reinforcement, sideways or lengthwise.
- Warp Knit — lengthwise loops, stable and less stretchy.
- Weft Inserted Warp Knit — extra yarns inserted sideways into warp loops.
NONWOVEN / BONDED
- Fiber Mat — randomly arranged fibers, soft and absorbent.
- Stitchbonded — fibers held by stitching yarns laid lengthwise.
- Biaxial Bonded — fibers bonded in two directions.
- XYZ Laid-in — three orthogonal directions, full 3D reinforcement.
Wovens vs. Knits, Side by Side
The construction difference between wovens and knits cascades into everything downstream — how a fabric stretches, drapes, and holds its shape on a body.
Wovens
- Made by interlacing yarns at right angles.
- Minimal stretch unless elastane is added.
- Crisper, more structured — holds shape well.
Knits
- Made by looping yarns.
- Naturally stretchy, especially in width.
- Softer, more flexible — conforms to the body.
Inside a Woven: Warp & Weft
Warp runs vertically on the loom and holds the structure in place — it's the stronger, more tensioned set, since it has to withstand the weaving process itself.
Weft runs horizontally, woven over and under the warp threads. It's what gives a woven fabric its flexibility, fill, and width-wise behavior. Together, warp gives stability and weft adds coverage.
Weft vs. Warp Knitting
Every knit fabric is loops — the question is which direction they're built in, and that single choice decides how the fabric stretches, unravels, and holds its shape.
Two reference directions show up on every spec sheet: wale, the vertical column a loop stack runs in, and course, the horizontal row a single pass of yarn makes.
Weft Knitting
- Yarn runs horizontally, forming loops side to side across the fabric.
- The default for apparel — t-shirts, sweaters, leggings.
- Naturally stretchy, especially widthwise.
- Can unravel or ladder easily if cut or snagged.
Warp Knitting
- Yarns run lengthwise, each lapping between two neighbouring columns of loops.
- Made on dedicated warp knitting machines.
- More stable and less stretchy — better for technical or structured builds.
- Doesn't ladder or unravel as easily.