If you've ever bought a t-shirt that felt substantial, held its shape after washing, and didn't cling or sag — it was almost certainly midweight jersey. At 180 g/m², this is the sweet spot that most quality brands land on: heavy enough to feel premium, light enough to wear all day.
The 5% elastane is what separates midweight jersey from a basic 100% cotton knit. That small percentage of stretch fiber gives the fabric memory — it returns to its original shape after being pulled, stretched, or washed. Over time, this means the garment holds its silhouette instead of bagging out at the collar and underarms.
When in doubt, spec midweight jersey. It's the default choice for a reason — opaque, structured, and durable enough for repeated washing.
Why 5% elastane makes a difference
Pure cotton jersey has no memory. Stretch it and it stays stretched. This is fine for a garment that fits loosely, but for anything with a fitted silhouette — a crew neck that sits close to the neck, sleeves that taper at the wrist — elastane is what keeps the shape intact.
The 5% ratio is a deliberate industry standard. Less than that and you lose meaningful recovery. More than that and the fabric starts to feel synthetic and loses breathability. At 5%, the cotton hand feel is fully preserved while adding the structural benefit of the elastane.
How it compares to other jerseys
Production specs for your tech pack
| Spec | Value | Notes |
|---|---|---|
| Fabric type | Single jersey knit | Machine knitted, not woven |
| Weight (GSM) | 180 g/m² | Tolerance ±5 g/m² |
| Fiber content | 95% Cotton, 5% Elastane | Combed cotton preferred |
| Shrinkage | Max 3% after wash | Elastane reduces shrinkage vs. 100% cotton |
| Dyeing method | Piece dyed (reactive) | For solid colors |
| Color standard | Pantone TCX | Textile Cotton eXtended palette |
In FlatLabs PRO, selecting Midweight Jersey automatically populates your BOM with fiber content, GSM, and care label requirements — including the elastane content declaration required by EN ISO 3758.
Care label requirements for elastane blends
When your fabric contains elastane, even at 5%, your care label must declare it. EU regulation requires full fiber content disclosure on any garment sold in Europe. The label reads: 95% Cotton, 5% Elastane — in that order, by weight.
For washing instructions: elastane blends can typically handle machine wash at 30–40°C, but should not be tumble dried at high heat — the heat breaks down the elastane fibers over time. Specify this in your construction notes so your factory includes the correct care symbols.