The Short Answer
Cotton refers to the fiber — a natural plant material. Jersey knit refers to the construction — a specific knitting pattern that creates stretch. Cotton can be woven (no stretch) or knitted into jersey (stretchy). Most "cotton underwear" is actually cotton jersey knit. They're not opposites — one describes the material, the other describes how it's made.
Fabric Properties Side by Side
| Property | Woven Cotton | Cotton Jersey Knit |
|---|---|---|
| Construction | Warp-and-weft plain weave | Single-knit loop structure |
| Stretch | None — rigid in both directions | Significant crosswise stretch |
| Surface | Flat, visible weave grid | Vertical ribs (face), horizontal loops (back) |
| Drape | Stiff, structured | Soft, fluid |
| Recovery | N/A — doesn't stretch | Good — springs back to shape |
| Breathability | Excellent | Excellent |
| Feel | Crisp, papery when thin | Soft, t-shirt-like |
| Common use | Handkerchiefs, quilting, linings | T-shirts, underwear, camisoles |
How to Tell Them Apart: The Visual Test
Pull the fabric sideways.
- Woven cotton: it resists. There's no give in either direction. If you look closely, you can see a grid of perpendicular threads (warp and weft) crossing each other.
- Jersey knit: it stretches easily sideways and springs back. Look closely and you'll see tiny V-shaped loops forming vertical columns (the knit side) or horizontal bumps (the purl side).
The stretch test is definitive. If it stretches, it's knitted. If it doesn't, it's woven.
Common in Lingerie
Woven cotton is rare in modern lingerie. You'll find it in some cotton gusset linings and in vintage-reproduction underwear. Historically, all undergarments were woven cotton or linen before knitting machines made jersey available.
Cotton jersey is the backbone of everyday underwear. Basic panties, bralettes, sleep camisoles, and lounge shorts are typically cotton jersey or cotton-elastane jersey. It's the default fabric when comfort and breathability matter more than aesthetics.
In our fabric taxonomy, we classify by appearance: if a product looks like soft cotton with no sheen, we label it "cotton" regardless of whether it's woven or jersey — because that's how consumers search.