If you let your cat outside you make sure they have a safe collar with contact information including: your name, address, email address and telephone number. A break-away collar will allow your cat to break out of the collar if it gets tangled on something. Be sure to check that the contact information remains readable over time. If it is unreadable it won’t help. Engraved pet tags are good for making sure they remain readable.
Bells on the cat collars are a good idea that helps prey notice the cat and escape. Still cats can catch prey, but the bells can make it more difficult.
One great option is the Vedante super reflective break-away cat collar with glow in the dark tag.