Can anyone identify what slippers these are? My husband loves them.

Whenever anyone in the family has bought him new slippers, he tries them out but then goes back to these old things. He says they’re more comfortable. I’ve tried reverse image search, but either these ones look so worn away that I don’t recognize them new, or they’re not coming up. The only identifier that hasn’t worn away is the number 791684 on an inside tag. It would be the best Christmas gift if I could find them again. Thanks in advance!