I just checked my ibex switchback pullovers & my ibex vertigo jackets - Both are loden and I think are felted, the switchback description says it is and I'd say the vertigo looks more felted.

Anyways, the tags say "dry clean or hand wash"

I know the vertigo jacket has been through the washing machine without a problem because my mother ran it through once when I was visiting her. After I finished freaking, looked at the jacket and it was fine. I'm pretty sure I've washed the switchbacks in a machine before as well.

It may depend on how harsh your washing machine is?