Yesland pets cat collars are made of solid nylon, build to last. The collars were created to be 100% safe for your cat and are reflective so at night you will see your cat. As long as people see a cat with a collar, they will know that it has a owner, not a stray cat, to prevent the cat from being adopted. To avoid cat injury, put on a beautiful little bell for the cat, which can remind the owner of the existence of the cat and avoid inadvertently letting the cat get hurt. Contains 12 different colors (Black, Azure, Orange, Pink, Yellow, Green, Royal blue, Fluorescent green, Purple, Olive green, Rosy, Red), let your pet change at any time, make it feel better.