This officially licensed NCAA Kentucky Wildcats cat safety collar is made of soft nylon woven webbing and includes a plastic safety release fastener. It is designed to break release when a cats collar gets caught, allowing the cat to slip free. It also has a tiny bell so that you can hear your friend coming! This collar is not to be used with a leash or tie out.Collar is 3/8 wide and adjusts from 8 to 12 long to fit most cats.