Field notes · 12 June 2026
The tag sewn into your waistband is a legal document, a confession, and a user manual — usually all three in under twenty words.
In most countries, fibre content labelling is required by law. The brand can say anything it likes on the swing tag — "luxe feel", "eco-conscious", "premium handle" — but the sewn-in label has to tell the truth about what the garment is made of. Which makes it the single most honest piece of writing attached to any piece of clothing. Here's how to read one.
"100% cotton" means what it says. "60% cotton, 40% polyester" means the soft hand you felt on the rack is cotton, and the pilling you'll see in March is polyester. The order matters too — fibres are listed by weight, biggest first. A quick instinct check:
Neither column is a moral failing. The question is never "is polyester bad" — it's what are you getting in exchange, and is it worth it for this exact garment? Polyester in a rain jacket is the point. Polyester in a "linen-look" summer shirt is a heat trap with good marketing.
When a label says "exclusive of trims" or "exclusive of decoration", it means the stated composition covers the main fabric only — the lace, embroidery, ribbing or sequins are something else, undeclared. Usually harmless. Occasionally it's where the scratchy bit lives.
A wool coat with a 100% polyester lining isn't a scandal — it's nearly universal. But an all-cotton or cupro lining at the same price point is a genuine signal that someone cared. When a label breaks out shell and lining separately, read both. The shell is what people see; the lining is what you live in.
The confusion here is the point — a wall of acronyms reads as "vaguely responsible" without saying anything. They do say specific things:
No certification makes a garment good. They narrow the range of ways it can be bad — each one in its own specific lane.
Care instructions aren't just chores — they're the manufacturer telling you how fragile the garment is. "Machine wash warm, tumble dry" is a vote of confidence. "Hand wash cold, dry flat in shade, cool iron on reverse" is a fragility confession written in hieroglyphics. And the rare printed disclosures — "may become transparent when wet", "fluorescent colours may fade" — are the label legally clearing its throat. Believe them.
On an op-shop rack, everything else has fallen away — no product page, no reviews, no original price tag. The sewn-in label is the only surviving document, and it's enough: fibre content tells you how it's worn so far and how it will keep wearing; the care symbols tell you whether it will survive your laundry habits; the country and certifications fill in its biography. Second-hand shopping is the one place where label literacy beats every other shopping skill.
This is, of course, the literacy Threadcheck automates — point your camera at the tag and the percentages, certifications, care symbols and trade-offs come back as one card, graded A to E. But the skill is worth having even without your phone. The label was always willing to tell you. It was just whispering.
FILED UNDER: LABEL LITERACY · CERTIFICATIONS · SECOND-HAND
