The Rogz Glow in the Dark Reflective Cat Collar is a great way to add some style and function to your cat’s outfit. The black collar features a breakaway buckle, which is necessary for safety reasons. The collar also has a removable color-coded bell, which allows you to customize the look. The collar is made of nylon and is 3/8″ wide. It adjusts fully for neck sizes of 8-12 inches.