Composition label: what must it show, and how do you read it?

The textile composition label lists a garment's fibers as a percentage of their weight, in descending order. It is mandatory in Europe, in the language of the country of sale: French in France. The mentions organic cotton and recycled polyester are regulated: it is the most reliable benchmark for choosing the fabric of your merch.

The essentials in 4 points:

• The composition label is a European legal requirement: fibers as a percentage of weight, with no right to lie.
• Conventional cotton, organic cotton, virgin or recycled polyester: each mention has a precise meaning, and the GOTS and GRS labels certify them.
• The label says nothing about fabric weight, fiber quality or fit: always read it alongside the product page.
• On custom apparel, the manufacturer handles the regulatory label: your job is knowing how to read it to choose well.

Two nearly identical sweatshirts, two labels: "100% organic cotton" on one, "50% cotton, 50% polyester" on the other, and a few euros between them. If you are choosing the fabric for your merch, that little composition label sewn inside is the most honest document on the garment: it is not allowed to lie. You just have to know how to read it.

That is exactly where everything plays out, well before the photo or the price tag. Here is the decoder.

What exactly is the composition label?

The composition label lists the textile fibers that make up the garment, as a percentage of their weight, from the most present to the least. "80% cotton, 20% polyester" means: in 100 grams of fabric, 80 grams of cotton and 20 of polyester.

It is also a legal requirement: European regulation makes this label mandatory on every textile item sold, in the language of the country of sale (French in France), as the official factsheet of the DGCCRF, the French consumer protection authority, reminds. The manufacturer has no choice, and that is your advantage: it is the only information on the garment that is framed by law. Marketing can embellish; the composition label cannot.

Where to find it? Most often at the collar, or sewn into the inner side seam, hip side. On home linen and textile accessories, it slips into a hem. If a garment has none at all, be wary: it is mandatory.

Not to be confused with its neighbor: the care label, the one with the little washing symbols. That one is not mandatory in France, merely recommended. The two often live on the same strip of fabric.

Reading the percentages: what the numbers tell you

The composition first tells you which family you are in.

100% cotton: the natural fiber, breathable, soft, what you expect on a garment worn close to the skin. It is the standard on premium garments.

Cotton-polyester blend (the famous 50/50 or 80/20): polyester adds wash durability, lowers the risk of shrinking, and keeps the price in check. It is not a trick, it is an engineering choice: the market's reliable basics are almost all blends. Cotton or polyester: the full comparison helps you decide by use case.

Mostly polyester: light, quick-drying, holds bright colors. Its natural place is activewear, less the everyday sweatshirt.

The reflex to build: the higher the share of cotton, the more you pay for the fiber; the higher the share of polyester, the more you pay for stability and a tight price. Neither family is a trap; they serve different uses.

Organic, recycled, conventional: the real match of cottons and polyesters

This is where the label gets interesting, because "cotton" does not say it all. We are talking about the textile fiber here, not a grocery aisle.

Conventional cotton is the global standard: nothing wrong with it for comfort, but its cultivation is thirsty for water and treatments. It is the cotton of most basics: it explains their price.

Organic cotton is grown without synthetic pesticides or fertilizers. On the label, it appears as "organic cotton". It costs more to produce, and that extra cost is what you find on the garment. What it changes for your merch: a solid answer to the question your community asks more and more, "is this sweatshirt clean?", and a real argument when it is time to sell on your Store. Why organic cotton costs more breaks down that extra cost. The Roller Crewneck, in 280 gsm organic cotton, is the textbook example of the sweatshirt that carries this argument.

Polyester, and recycled polyester in particular, most often starts as plastic bottles or textile offcuts, turned back into fiber. Same properties as virgin polyester, reduced footprint. You spot it on the label under the mention "recycled polyester", on activewear and stabilized basics. And keep the consistency rule: a garment that claims organic shows it clearly, as "100% organic cotton" or as a blend of organic cotton and recycled polyester when you want more durability; either way, the composition must tell the same story as the brand.

A trust benchmark: these mentions are regulated, and independent labels certify them, like GOTS for organic cotton or GRS for recycled materials. If a garment advertises itself as "organic" without organic cotton in its composition, turn the collar over twice.

What the label does not say

Let's be honest about the limits: composition is not the whole of quality.

It says nothing about fabric weight (the thickness of the fabric), nothing about fiber quality (a ring-spun combed cotton and an ordinary cotton both read "100% cotton"), nothing about fit or finishings. It does, however, say whether the garment contains an animal fiber, wool or silk: a first clue before looking for a vegan label on the product page. Nothing either about the printing: how an embroidery or a print holds up is judged on the product page and on the garment, not on the label. Two "100% cotton" t-shirts can be worlds apart: one thin as paper, the other dense and well finished.

That is why the label is read WITH the product page, never instead of it. On a serious catalog, like the sweats and hoodies section, every garment displays its composition, its fabric weight and its fit: the three together tell the real quality. The label gives you the family, the product page gives you the level.

How to use it to choose your custom apparel

The simple method, the one I have always applied:

1. Start with the use: an event garment worn one weekend does not need the same fabric as a well-cut fashion sweatshirt worn for years.
2. Choose the composition family: stable and economical blend for large runs, mostly cotton or organic for the garments people should want to wear.
3. Check the full trio on the product page: composition, fabric weight, fit. That is what separates two garments with the same label.
4. Keep your message consistent: if your community cares about the responsible argument, the organic cotton or recycled polyester on the label IS part of your communication. The garment speaks for you, down to its collar.

And one piece of good news to finish: you do not have to handle the label yourself. On custom apparel, the garment's manufacturer applies the regulatory composition; you choose with full knowledge. Your only job is knowing how to read it. Done.