The rolled collars worry me, because he definitely does not walk nicely on a leash all the time. He needs to be in a collar when I'm at work; my mother takes care of the dogs during the day, and her hands are too arthritic to get collar on and off easily. I do take it off in the evening and he sleeps without it on.
They worry you because you worry about strength? Grace is (still!) a crazy little scavenger on walks (stubborn teenage girl and as strong as a ~40 lb determined puppy can be), and I don't have any concerns about it holding up. And it's super lightweight. I also really don't like heavy hardware for my two.
I'm definitely not an expert, but I did quite like the people at the company I linked earlier (and braided matching leashes) are holding up well IMO.
Bailey has the Planet Dog hemp collar (and leash) and it is soft, but I didn't notice any positive changes in terms of his ruff hair breakage (he had to wear it all day when he was at daycare). Neither did I with the Ella's Lead satin lined collars. B doesn't have the best coat, though.