I like Lupine, as it comes with a lifetime guarantee. Even if the dog chews through it, just mail it back to them and they send you a new one, FREE.

Tasha, my puppy mill rescue, did not take kindly to harnesses (I don't use collars at all only harnesses on my dogs; to prevent any problems with collapsed trachea). Anyway, Tasha chewed her way through TWO! They just kept mailing back a new one for her, lol! WHEW! Before I got the Lupine, Tasha chewed through 3 others.

Not that Mikey would even chew his collar, but I'm just saying, it is a nice feature!