Morgan Products Plastic No-Slip Hoop 7"- (123)

My favourite hoops I think might not be in production any more, but are/were Dritz Loran Sure Grip hoops (link). Second favourite would probably be Morgan brand hoops (link). Both are designed with ridges to keep fabric from slipping. Nurge also has a bit of a ridge in their designs but I haven’t been able to get them to hold tension as well as the first two I mentioned.