corbinam
Moderator
Sorry to burst the bubble! I'm really not a fan of flat nylon collars for Shelties. If you leave a collar on all the time (and I do for safety reasons), I prefer a rolled collar - in any style, but preferably martinagle.
I find nylon collars rub and matt the fur - particularly if they are NOT martingales. I would consider a nylon martingale because at least it wouldn't chafe the fur.
Interesting. I have never used rolled collars, so I can't comment on that, but mine have never gotten matts under their collars. I hope it's not something to look forward to in the future!! *crosses fingers*

If that's the same kind. 

Those aren't the ones she used. I can't find the ones she used. They are not a martingale and they are not choke. I will have to ask next Wednesday when I see her what kind they are. They are really, really slinder and pretty looking.