What does this symbol mean?
ISO 3758 A washtub with wavy water line and the number 30 inside

Machine wash, 30°C

The item can be machine washed at up to 30°C (86°F).

Where a garment's own label or its manufacturer says otherwise, that takes precedence.

How to read it

The number in the washtub is the maximum water temperature in degrees Celsius. A tub with no line underneath indicates a normal wash cycle; one or two lines underneath indicate a milder cycle.

Also searched as: 30 degree wash, washtub 30.

More laundry symbols

Sources

  • Textiles — Care labelling code using symbols, ISO 3758, ISO
  • Standard Guide for Care Symbols for Care Instructions on Textile Products, ASTM D5489, ASTM International

Last reviewed September 23, 2026.