Woolmark's trouser guide directs readers to the sewn-in care label before washing. A Woolmark Machine Washable claim supports an appropriate wool-machine cycle, while a hand-wash-only instruction requires the separate gentle routine described in the reference. The label comes before assumptions based on the trousers' appearance or fiber name.

The guide also discusses refreshing wool suit trousers between washes with light brushing and a steamy bathroom. That can reduce unnecessary laundering, but does not alter the washing permission. When washing is needed, use a suitable mild detergent and follow the recommended drying approach, including protection from direct sunlight.
GarmentCare Guide 