Care labels decoded: what the symbols actually mean

Care symbols are standardised internationally, which makes them one of the few genuinely reliable things on a garment. They are also written in a pictorial language nobody is taught, so most people ignore them and wash everything at 40 degrees until something goes wrong.

There are five symbols. Learn the shapes and the modifiers and you can read any label in any country.

The five shapes

• A tub — washing
• A triangle — bleaching
• A square — drying
• An iron — ironing
• A circle — professional cleaning

A cross through any symbol means do not do that thing at all. That is the single most important rule, and it is the one worth acting on even if you learn nothing else.

The tub: washing

The number inside the tub is the maximum temperature in Celsius. Not the recommended one — the maximum. Washing cooler is always safe.

Dots mean the same thing where numbers are not used: one dot is 30°, two is 40°, three is 50°, and upward from there.

Underneath the tub:

• No bar — normal cycle, full agitation.
• One bar — reduced agitation, the "synthetics" or "permanent press" cycle.
• Two bars — delicate or wool cycle, minimal agitation.

A hand in the tub means hand wash only. A crossed-out tub means do not wash in water at all — dry clean or nothing.

The bars matter more than most people assume. Agitation, not temperature, is what felts wool and what wears cotton at the seams. A wool jumper at 30° on a normal cycle will felt; the same jumper at 30° on a wool cycle will not.

The triangle: bleaching

Rarely relevant now, and easy.

• Empty triangle — any bleach is fine.
• Two diagonal lines inside — oxygen bleach only, no chlorine.
• Crossed out — no bleach.

Note that "non-bio" detergents and most colour-safe detergents already contain oxygen bleach, which is why whites go grey more slowly in them than you would expect.

The square: drying

A square with a circle inside is tumble drying.

• One dot — low heat.
• Two dots — normal heat.
• Crossed out — do not tumble dry.

Plain squares with lines are line-drying instructions:

• A vertical line — hang to dry.
• A horizontal line — dry flat. This one is not a suggestion. A wet wool jumper hung on a line stretches under its own weight and does not recover.
• Diagonal line in the corner — dry in the shade. Relevant for strong colours, which fade in direct sun.

Tumble drying is the most destructive thing most people do to their clothes. The heat is part of it, but the bigger problem is mechanical: lint is fabric. Every load in the filter came off your clothes.

The iron: ironing

Dots again, and they are temperature bands rather than exact numbers:

• One dot — up to 110°C. Synthetics, silk.
• Two dots — up to 150°C. Wool, polyester blends.
• Three dots — up to 200°C. Cotton, linen.
• Crossed out — do not iron.
• Crossed-out steam lines underneath — iron dry, no steam.

Printed graphics and anything with a coating should be ironed inside out regardless of what the label says.

The circle: professional cleaning

A letter inside tells the cleaner which solvent to use — P and F for different dry-cleaning solvents, W for professional wet cleaning. These are instructions to the cleaner, not to you, and you can safely treat them all as "take it somewhere".

A bar under the circle means a gentle process. Crossed out means do not dry clean, which occasionally appears on garments with glued components.

What the label does not say

"Dry clean" is not always "dry clean only." Many manufacturers label conservatively to avoid complaints. If the symbol is a circle and the tub is not crossed out, hand washing is permitted. If the tub is crossed out, take it seriously.

Wash less than the label implies. The label tells you what a garment can survive, not how often to do it. Wool and denim in particular are better aired than washed; most knitwear needs washing after several wears rather than one, unless something happened to it.

The first wash is when shrinkage happens. If a garment is going to shrink, it will do most of it on the first wash at the highest temperature it ever sees. Washing the first time at 30° when the label permits 40° is a cheap insurance policy.

The short version

• A cross means never. That is the rule worth knowing above all others.
• The number is a maximum, not a recommendation. Cooler is always safe.
• The bars under the tub are about agitation, and agitation is what destroys wool and wears out seams.
• "Dry flat" is not optional for knitwear.
• Tumble dryer lint is your clothes.