What Do the Lines Under Laundry Symbols Mean?
Lines — also called bars or underlines — appear beneath washing, drying, and dry cleaning symbols and act as the "agitation modifier." While temperature tells your machine how hot to run, lines tell it how vigorously to move. One bar means gentler action; two bars means even more delicate handling. Understanding lines is essential for protecting fabrics that can't withstand the normal rough-and-tumble of a full wash cycle.
Lines under washing symbols
The wash tub symbol (a bucket shape with a wavy water line inside) represents machine washing. When lines appear below it, they reduce the aggressiveness of the cycle — specifically the drum speed, agitation intensity, and spin speed. A higher number of lines signals a more fragile garment. Getting this wrong is one of the most common causes of stretched seams, pilling, and colour fade.
| Lines | Cycle Name | Agitation | Best For |
|---|---|---|---|
| No line | Normal / Cotton cycle | Full agitation | Robust fabrics: cotton, towels, jeans, bedding |
| 1 line | Synthetics / Permanent press | Reduced agitation | Polyester, nylon, blends, shirts, trousers |
| 2 lines | Delicate / Gentle / Hand wash | Minimal agitation | Silk, lace, wool, cashmere, embellished items |
Note that lines are separate from temperature. A symbol can show 40°C with 2 lines — meaning wash warm but on the most delicate cycle available. Always honour both pieces of information independently.
Lines under tumble dryer symbols
The tumble dryer symbol is a square with a circle inside. Just as with washing, lines beneath the dryer symbol indicate how gentle the drying cycle should be. The drum movement, heat duration, and spin patterns all reduce as you add more lines. This matters most for fine knits, stretch fabrics, and items with decorative details that can snag or distort.
| Lines | Cycle Name | Best For |
|---|---|---|
| No line | Normal dry cycle | Cotton, towels, everyday fabrics |
| 1 line | Permanent press / Gentle dry | Synthetics, permanent press, blended fabrics |
| 2 lines | Very gentle dry / Delicates | Fine knits, delicates, loosely woven items |
Lines under dry cleaning symbols
The dry cleaning symbol is a circle, sometimes containing a letter (P, F, or A) indicating which solvents are safe. Lines below the circle tell the dry cleaner to use a gentler process — reduced mechanical action, lower temperature, or shorter cycle time. These are instructions for the professional cleaner, not for you at home, but it helps to know what they mean so you can communicate clearly when dropping off garments.
| Lines | Instruction to Cleaner | Typical Garments |
|---|---|---|
| No line | Normal dry clean | Suits, structured jackets, most dry-clean-only garments |
| 1 line | Gentle dry clean | Sensitive fabrics, structured knitwear, heavily embellished items |
| 2 lines | Very gentle dry clean | Very delicate: beaded gowns, antique fabrics, fragile structured pieces |
Why do lines matter so much?
Agitation — the physical movement of fabric against itself, against the drum, and against other garments — is the primary cause of fabric damage during washing. This is true even when the temperature is perfectly correct. Understanding agitation damage helps you see why lines are just as important as temperature settings.
Pilling occurs when fibres break under friction, tangle, and form small balls on the surface. Fine merino wool, cashmere, and synthetic fleece are highly susceptible. Even one normal wash cycle can introduce pilling that wouldn't occur in ten gentle cycles.
Stretching is caused when wet fabric — which is heavier and more elastic than dry fabric — gets thrown around by vigorous drum rotation. Knits, stretch fabrics, and loosely woven items can permanently lose their shape in a single normal cycle wash.
Seam stress builds up over multiple washes. Strongly constructed seams on workwear may tolerate normal cycles indefinitely, but decorative stitching, French seams on silk blouses, or delicate embellishments on evening wear can split or fray after surprisingly few heavy-agitation washes. Two lines on the symbol is the manufacturer's way of telling you: this garment cannot withstand that stress.
How to select the right cycle on your machine
Machine manufacturers don't always use the same cycle names, which makes translating care label lines into machine settings confusing. Here is a general mapping across common machine programme names:
| Symbol Lines | US Machine Names | UK/EU Machine Names |
|---|---|---|
| No line | Regular, Normal, Cotton | Cotton, Main wash |
| 1 line | Permanent Press, Casual, Easy Care | Synthetics, Easy Care, Mixed |
| 2 lines | Delicate, Gentle, Hand Wash | Delicates, Wool, Hand Wash |
If your machine lacks a specific programme, always default to the gentler option. A delicate item washed on permanent press once will likely survive; a delicate item washed on cotton regularly will not. When possible, also reduce the spin speed manually — agitation from spinning can be just as damaging as drum tumbling.
For items with 2 lines on the wash symbol, using a 30°C wash on the delicate programme gives maximum protection — cold water further reduces fibre stress and dye bleeding on fragile fabrics.
Frequently asked questions
Does 2 lines mean hand wash only?
Not exactly. Two lines under the wash tub symbol means use the most delicate machine cycle available — typically labelled "Delicate" or "Gentle." A hand wash symbol is a separate, distinct symbol (a tub with a hand inside it). Two lines means the gentlest machine cycle; the hand wash symbol means skip the machine entirely and wash by hand. That said, when in doubt, hand washing is always safer than a machine gentle cycle.
What's the difference between 1 line and 2 lines under a wash symbol?
One line indicates a reduced-agitation cycle — such as Permanent Press or Synthetics — which uses slower drum action and a reduced spin speed. Two lines indicates the minimum agitation available on a machine — Delicate or Gentle — with the slowest drum movement and lowest spin. Two-line garments are significantly more fragile and are usually made from fine natural fibres or loosely constructed fabrics.
My machine doesn't have a 'Synthetic' cycle — what do I use?
Look for a cycle named "Permanent Press," "Easy Care," "Mixed," or "Casual" — these are all common names for the same programme. If your machine only offers Normal and Delicate, use Delicate for 1-line garments. The goal is reduced agitation and spin speed, so anything gentler than Normal is a better choice than Normal itself.
Can I use a normal cycle if there are 2 lines on the symbol?
Technically you can, but you risk damaging the garment — especially over repeated washes. Pilling, stretching, seam stress, and colour fading all accelerate with excess agitation. Two lines is the manufacturer's explicit instruction that the fabric requires the gentlest handling. For garments you care about preserving, follow the symbol.
Identify any symbol on your label
Browse the complete symbol library to decode washing, drying, ironing, and dry cleaning care icons.