BirdsBeSafe® Break Away Cat Collar with Bell, Reflective Thread for Night Visibility, Comfortable Elastic Stretch Cat Collar to Protect Cat from Getting Stuck in The Garden.

Great stretchy collars. Cats could pull head through if caught on a branch, but they do not lose them or pull them off on their own, so they don't get lost like other breakaway collars, which gets expensive. Got raggedy quickly but I don't mind. It kind of goes with the whole fur thing.