The product description 1. Dog Collar - Whether your furry friend is a little adventurous or you want to know where they are when you’re on vacation, the Albion Leather Dog Collar with Built-in Holder is an option. 2. Materials - This personalized dog collar is made from premium cowhide leather, which is very durable and has a smooth finish that guarantees survival over time. 3. We designed a leather collar with a built-in pocket for the dog to fit and allow the device to fully function without fear of losing or damaging it. 4. These dog tracking collars are adjustable and have a fully functional, lightweight design. Plus, it comes in three sizes, ready to go with your beloved pooch. Please check our size list before ordering.