I have heard that some weavers wear socks when weaving. I just found what I think is a wonderful loom slipper. It is soft like a sock but has a little grippyness on the bottoms...and best of all they are WOVEN by HMONG weavers of North Vietnam. They are a new product line from feelgoodz.
I love how they feel and I love that there is a woman spinning on the hang tag.
Sizing: I wear size 9 so I ordered the medium (7-9) and they fit great.
Here are some pictures:

Woven soft slippers from feelgoodz.com

The bottoms have no-slip strips.

I love the hang tag too.