I have worked closely with several veterinarian hospitals, and I have seen way too many DEATHS due to collars on cats. Cats climb, rub on knobs, and easily get that collar hung up on everyday items. Cats are NOT DOGS. When they get hung up they immediately freak out, start rolling like an alligator and die due to suffocation, broken necks, or shock! The so-called breakaway collars are not 100% and I have seen many a cat die from those as well. If you want to identify your cat, please microchip. Besides, a collar can be slipped, but they cannot slip a chip! Horrifies me and gives me nightmares every time I see a cat posted on this site with a collar. I actually cry knowing what I have seen and how many times I have seen it. It is a senseless way to die when it can be so easily prevented. TAKE THE COLLARS OFF OF CATS!! If you don't believe me, just google search " dangerous collars on cats"