In plain English: Iron at low temperature only — up to about 110°C / 230°F. This is the synthetics setting.
What it looks like on the tagA simple iron silhouette with one dot inside it.
What to do
- Set the iron to one dot / “synthetics” / lowest heat.
- Iron inside out, or through a thin pressing cloth, to prevent shine marks.
- Keep the iron moving — synthetics scorch where the iron lingers.
What happens if you ignore it
Too hot and synthetics don't burn — they melt and glaze. A polyester shine mark or a warped acrylic patch is permanent.
Where you'll see it
Polyester, nylon, acrylic, acetate, and blends dominated by any of them.
Common questions
Can I steam on the low setting?
Most irons produce weak steam at low heat. Check for a no-steam symbol; a garment steamer on low is often the safer wrinkle-fix.
What if there's no dot, just the iron shape?
A plain iron symbol means ironing is allowed at any temperature. Dots only appear when heat needs limiting.
Related symbols
- Iron Medium Heat — iron at medium temperature
- Iron High Heat — iron at high temperature
- Do Not Iron — no ironing at any temperature
- Iron Without Steam — ironing is allowed (at the dot temperature shown), but without steam
Or just scan the label
CareLabl reads the entire care label in one photo — every symbol on it, decoded into plain English, plus the fabric composition. Works with international and US labels. Try Pro free for 3 days, no credit card needed.