Dots, dashes, and a mystery triangle. Your care tag is trying to help.
Buy a great new sweater, wash it wrong once, and it can shrink to a size that fits your Chihuahua. The instructions for avoiding that are printed right on the garment, on the care label most of us ignore.
Those tiny shapes are not random. They are a short, standardized code for how to wash, bleach, dry, iron, and dry clean an item. Learn the five families of laundry symbols and you can care for almost anything in your closet with confidence.
This guide walks through the common symbols in each family, plus the dots, numbers, and bars that fine-tune them.
Key Takeaways
Five families: Every care label covers washing (tub), bleaching (triangle), drying (square), ironing (iron), and dry cleaning (circle).
Dots and numbers set the temperature: in the US system more dots means hotter, while an ISO number in the tub is the maximum wash temperature in Celsius.
Bars mean go gentler: lines under the tub or circle call for a milder, slower cycle to protect delicate fibers.
An X means do not: any symbol crossed out forbids that action, so skip it to avoid wrecking the fabric.
Care labels follow one of two nearly identical standards. Most of the world uses ISO 3758, while the United States and Canada use the ASTM D5489 system that American brands adopted back in 1996. The shapes are the same, so a shirt bought in Paris and one bought in New York carry the same basic instructions. The main difference is that ISO prints a temperature number inside the wash tub, while ASTM uses dots.
Every symbol sorts into five families, one per basic laundry action: washing, bleaching, drying, ironing, and dry cleaning. Learn the base shape for each, then the dots, lines, and Xs that modify it, and the whole label becomes readable.
Washing Symbols
The “tub” icon represents the wash cycle. It tells you the water temperature and the agitation intensity (how hard the machine spins and shakes the load).
Do Not Wash
A tub with a large X through it means keep the item out of the washing machine. Water will likely damage the fabric, so these items usually need a professional dry cleaner instead.
Hand Wash Only
A tub with a hand inside means you need to hand wash the item. Use lukewarm water (never exceeding 40°C (104°F)) and a gentle detergent in a sink or basin.
Wash Temperatures
Inside the tub you will see either a number or a set of dots, depending on which standard the brand follows.
Numbers (ISO): the maximum wash temperature in Celsius, commonly 30°C (cold), 40°C (warm), 60°C, or 95°C (hot). Never exceed it.
Dots (US/ASTM): each dot is a set temperature. One dot is 30°C (cold), two dots 40°C (warm), three dots 50°C (hot), rising to six dots at 95°C for heavy whites.
Pro Tip
If there are no lines underneath the tub, use a “Normal” cycle with the indicated temperature.
Permanent Press Cycle
One line drawn under the tub means a Permanent Press cycle, which uses a slower spin and reduced agitation to limit wrinkles. It suits synthetic fabrics like polyester.
Gentle or Delicate Cycle
Two horizontal lines under the tub mean use the Gentle or Delicate cycle. The machine agitates very slowly to protect fragile fibers like wool and silk.
Bleaching Symbols
Triangles control stain removal and whitening. The wrong bleach can ruin a garment in a single wash, so read this shape carefully.
Do Not Bleach
A triangle with an X through it is a warning: use no bleach of any kind. Bleach will strip the color or eat through the fabric.
Bleach Allowed
An empty, open triangle means you can safely use any bleach, including chlorine bleach, when you need it.
Non-Chlorine Bleach Only
A triangle with two diagonal lines inside allows bleach, but only non-chlorine bleach, also sold as oxygen or color-safe bleach. Its active ingredient is usually hydrogen peroxide or sodium percarbonate, gentler than the chlorine bleach that would be too harsh here.
Drying Symbols
The square icon governs drying. A circle inside the square refers to a machine dryer (tumble dry), while lines inside the square refer to natural air drying.
Tumble Drying
Tumble Dry Allowed
A square with a circle inside means you can put the item in the dryer. An empty circle means any heat setting is fine.
No Heat / Air Fluff
A solid black circle inside the square tells you to use the “Air Fluff” or “No Heat” cycle. Heat will damage this fabric.
Low Heat
One dot inside the circle means low heat. It is standard for delicates and synthetics that can melt or warp at high temperatures.
Medium Heat
Two dots mean a medium heat setting, the common choice for everyday cottons and blends.
High Heat
Three dots mean you can use high heat. You usually see it on heavy, durable items like towels, jeans, and linens.
Do Not Tumble Dry
A square with a crossed-out circle means the dryer is off limits. Air dry this item to avoid shrinkage or heat damage.
Air Drying
Air Dry / Line Dry
An empty square generally means line drying is preferred. Hang it outside or on a rack indoors.
Do Not Wash or Dry
A plain square crossed out is uncommon, but it signals the item should not be washed or dried at home. Consult a professional cleaner.
Do Not Wring
A symbol that looks like a twisted candy wrapper with an X means “do not wring.” Twisting the fabric breaks the fibers, so instead roll the wet item in a clean towel and press to absorb the water.
Dry Flat
A square with a single horizontal line in the center means lay the item flat. Sweaters and knits need this because hanging them wet stretches them out of shape.
Dry in the Shade
Two diagonal lines in the top corner mean the sun will fade or yellow the fabric. Dry this item in the shade or indoors away from windows.
Line Dry
A single curved line (a clothesline) at the top of the square means hang the item to dry on a clothesline or hanger.
Drip Dry
Three vertical lines mean “drip dry.” Hang the item while it is soaking wet and do not spin or squeeze it. It is common for wrinkle-resistant synthetics.
Ironing Symbols
Ironing symbols are shaped like an iron. They tell you whether you can press the garment and at what temperature.
Iron Allowed
A plain iron icon means you can iron the garment at any temperature and use steam if you like.
Do Not Iron
An iron with a big X through it means heat will ruin the fabric. Keep it off the ironing board.
Steam Allowed
An iron with lines coming out of the bottom explicitly allows steam ironing.
Do Not Steam
An iron showing steam lines crossed out means you can iron the item dry, but steam will harm the fabric.
Low Heat
One dot inside the iron means cool heat (max 230°F / 110°C). Use it for silk, acrylics, nylons, and acetates.
Medium Heat
Two dots mean medium heat (max 300°F / 150°C). This setting suits wool and polyester blends.
High Heat
Three dots mean high heat (max 390°F / 200°C). Use it for sturdy natural fibers like cotton and linen.
Dry Cleaning Symbols
Circles belong to the dry cleaner. Most versions are instructions for the professional, but two of them tell you what to do at home.
Do Not Dry Clean
A circle with an X means the chemicals used in dry cleaning will damage the garment. You likely need to wash it at home.
Dry Clean Only
A plain circle means the item must be professionally cleaned. Do not toss it in your washing machine unless you want to ruin it. You can try home dry cleaning kits to refresh it, but they do not deep clean the way a pro does.
Chemical Codes (F, P, W)
Letters inside the circle tell the cleaner which solvent to use: P is perchloroethylene (perc), F is hydrocarbon (petroleum) solvents only, and W is professional wet cleaning, a gentler water-based process. You do not need to memorize them, just make sure the cleaner sees the tag.
Gentle Cleaning
Lines underneath the circle tell the cleaner to use a milder cycle with reduced heat, moisture, or mechanical action.
FAQs
What if I Cut the Tag Off?
With no tag, judge the item by its fabric. Cotton usually handles warm water and tumble drying, synthetics need low heat, and wool or silk should be hand washed or dry cleaned to stay safe. When you are unsure, wash cold on a gentle cycle and air dry, the lowest-risk combination for almost any garment.
What Does a Square With a Circle Inside Mean?
A square with a circle inside is the tumble-dry symbol, meaning the item is safe for a machine dryer. Dots inside the circle set the heat: one is low, two is medium, and three is high. A crossed-out version means do not tumble dry.
Can I Wash Clothes That Say Dry Clean Only?
Sometimes, but proceed with caution. Structured items like tailored blazers and suits should always go to the cleaner, because washing warps their inner shaping. Simple silk or rayon pieces can sometimes be hand washed gently in cold water, though you risk changing the fabric’s texture or color.
Why Do the Symbols on My Clothes Look Different?
Different-looking symbols usually mean a different regional standard, not a different instruction. The US and Canada use the ASTM system, which shows wash temperature as dots, while most other countries use ISO 3758, which prints a number in the tub. The five base shapes match, so once you know one set you can read the other.
What Do the Dots in a Laundry Symbol Mean?
Dots stand for intensity, and more dots always means hotter. Inside a wash tub or an iron they set the temperature, and inside the tumble-dry circle they set the dryer heat, starting at one dot for the lowest setting. On the wash tub, one dot is roughly 30°C and each added dot steps the temperature up.
Final Thoughts
Care symbols look fussy, but they exist to save you money by keeping clothes in shape, in color, and in one piece for longer. Once you can spot the five base shapes and read the dots, numbers, and bars, most labels take a couple of seconds to decode.
When two symbols seem to conflict or you are unsure, choose the gentler option. Washing a warm-water item in cold rarely hurts it, while boiling a delicate blouse ends it. Check the label, sort your piles, and wash with confidence.
Beth McCallum is a freelance writer & book blogger with a degree in creative writing, journalism, and English literature.
Beth firmly believes that a tidy house is a tidy mind. She is always looking for new ways to sustainably clean and tidy her house, that's kind on the environment but effective in the house, too!
