The label is product-specific
In the United States, the FTC Care Labeling Rule requires covered manufacturers and importers to provide regular care instructions and relevant warnings with a reasonable basis for those instructions. That makes the sewn-in care label more specific than a generic fiber guide.
Read the complete instruction
A washing instruction can address the wash method, water temperature, drying method, ironing, bleaching and warnings. Do not stop after reading only “machine wash” or only the temperature.
Warnings matter
Instructions such as wash separately, wash with like colors, do not iron or use only non-chlorine bleach describe restrictions that can prevent damage to the item or other items in the load.
Blends and trims are a reason not to guess
A garment can contain lining, elastic, coatings, buttons, prints or multiple fibers. The finished-product instructions are intended to account for the item as a whole, which is why WashCareLab keeps the care label ahead of generic fiber advice.
Garment care labels, appliance manuals and laundry-product directions can be more specific than a general guide. Use them when they set a tighter limit.