These are so comfortable that I felt like I was wearing slippers to work.  They look like suede but obviously aren't.  The "velour" fabric cleans up easily.  Thet are machine washable but I've not yet done that.  If anyone has I'd like To hear about the results.

For those who want arch support, you might need to add an insole or arch support.  Also, I have a wide toe area and a narrow heel yet always fit a standard medium width.  For those teetering between medium and wide width you might consider a wider width as the toebox is a wee bit narrower than I find in other mediums.

UPDATE:  I washed them; no fading and looked brand new not like they'd been washed.  I'm impressed.