Rib knit is not the same fabric as jersey. Where jersey is a flat, single-faced knit, rib knit has a distinct vertical column structure — alternating raised and recessed ribs — that gives it exceptional stretch and recovery in both directions. Pull it wide, let go, and it snaps back.
This is why rib knit is used for necklines, cuffs, and waistbands. These are the parts of a garment that need to stretch easily — to go over a head, to slip over a hand — and then return to their original shape. Jersey can't do this reliably. Rib knit can.
Spec rib knit for any part of the garment that needs to stretch and recover — necklines, sleeve cuffs, and waistbands. It's a trim fabric, not a body fabric.
What "1×1" means
The "1×1" refers to the rib pattern: one raised knit column alternating with one recessed purl column. This creates an even, balanced rib structure with maximum elasticity in both directions.
Other rib structures exist — 2×1, 2×2 — but 1×1 is the standard for t-shirt trims. It has the most stretch, the most even appearance, and works well at the narrow widths used for neckbands (typically 2–3 cm finished width).
Where it appears in a t-shirt
On a standard crew neck t-shirt, rib knit appears at the neckline as a separate strip of fabric — the neckband — that is sewn onto the body after the shoulder seams are closed. The neckband is cut slightly shorter than the neckline opening, then stretched to fit as it's sewn. This controlled tension is what gives the neckline its clean, snug appearance.
On long-sleeve garments, rib cuffs work the same way — cut narrow, sewn under tension, finished with a coverseam or overlock. On some styles, a rib waistband is used at the hem instead of a turned-and-stitched hem.
Production specs for your tech pack
| Spec | Value | Notes |
|---|---|---|
| Fabric type | 1×1 Rib knit | Distinct from single jersey body fabric |
| Fiber content | 95% Cotton, 5% Elastane | Must match body fabric fiber declaration |
| Stretch | Min 100% in width | Must stretch to 2× its width without breaking |
| Recovery | Min 95% after stretch | Returns to original width after release |
| Neckband width (finished) | 2–3 cm | Specify in POM as "Neck width" |
| Color standard | Pantone TCX | Must match body fabric color lot |
In FlatLabs PRO, the neckband is automatically included as a separate line item in your BOM when a rib neckline is selected — with its own fiber content, color spec, and placement note.
Color matching the body fabric
Rib knit and jersey absorb dye differently — even from the same dye bath, they can come out slightly different shades. This is a known production challenge, especially in darker colors and saturated tones.
The standard solution is to spec both fabrics from the same supplier and request that they be dyed in the same lot. Include this note in your BOM: "Neckband rib and body jersey to be dyed in same lot — color match required." This gives your factory clear instructions and protects you if there's a variation at QC.