Other people on here know better than me but the elastic ones can be worse than the rigid ones. Some of the elastic ones are designed to snap which aren't ideal but better than the ones that just strech. Teresa can correct me but I think rosey may have been wearing an elasticated one. What can happen is it stretches enough that they can get one
paw leg through. Then when they struggle, it gets embedded into their skin. I complained to trading standards about PAH calling elasticated collars safety ones. They (Cheshire council) said they will bring it up in the next meeting but I didn't hear any more.
All the collars from kittycollars.co.uk are safety
Some (not all) of PAH are safety and even wilkinsons sell a safety one.
The safe ones snap apart under pressure. It means that once in a while you might lose a collar but better than losing or injuring a cat.
I'm not finger wagging just passing on stuff I learned on here.
Here's another company that only sells real safety collars
www.kittycatboutique.co.uk/No collars on there at the moment