Bronz,
I hate answers like this, but it depends.
First thing I would do is double check the care instructions on the tag and follow those.
In the absence of a tag, I think I would carefully hand wash in the sink with gentle detergent ( I use a clothing soap made for hunter's without scent or dyes). Then roll the garment up tightly in a dry towel to get most of the water out. Then I would lay it out or drape it over something while it finishes drying.
Are we talking about a shirt, sweater, jacket or what?
OkKeith