Made of durable polyester. Dimensions: Minimum and maximum collar length: 39-62 cm, collar width – 2.5 cm. The collar comes with a special QR tag, using which you can enter your dog’s or cat’s data and contact information into the application. In case of loss, the finder will scan the QR code on the collar and receive information about you. The location of the scan will be recorded in your application. The application is free to use.