The main reason why my cat wearing a collar is so that it is clearly visible to motorists. Other collars simply have not enough for me Reflekroren - this is almost completely made of reflective material. The shutter is very easy on the one hand, what good and very important is if the cat gets stuck somewhere, on the other hand the collar goes by too easily lost (My cat has already lost one). This fact should make even aware when a trailer attached to the collar, because that is of course with away. The bells could save my mind that I would never do that to my cat. Fortunately it comes with pliers very easy abzuknipsen.