I've got a 65lb dog with a really large, strong neck & front end. Unfortunately, he also suffers from hives around his neck, where is collar sits. When he doesn't wear a collar, the rash goes away. I've tried at least 4 different types of collars, but the rash always reappears, so I finally tried a hemp collar. It's the first collar that he's worn that hasn't resulted in the rash and it's soft and much more comfortable than a stiff nylon collar. It's also strong enough that I don't have to worry about it breaking if he happens to see a squirrel that he thinks is antagonizing him on our daily walks.