Cat Collars & Harnesses Cat collars are used primarily for animal identification. Outfit your cat collar with an ID tag that has your contact info printed on it in the event your pet gets lost. Breakaway cat collars are generally preferred because they significantly reduce the likelihood your cat will get caught on something, like a tree branch or fence. Cats like to prowl, explore and sometimes slink into tight spots. A breakaway collar will prevent your kitty from getting hung up or worse, strangled. Reflective cat collars are ideal for outdoor cats, especially if your cat patrols your home or street in the evening. Cat collars also double as fashion accessories, with many colors, patterns and materials available. Leather cat collars are particularly popular because they are durable and stylish. Cat owners also use leashes to distinguish the gender of their pet.