Using your Sublime Adjustable Dog Collar is easy. First, pick the right size for your dog. Adjust the collar to fit snugly around your dog's neck, but make sure you can fit two fingers between the collar and your dog's skin. When you're walking your dog, you can attach it to the Sublime Dog Leash for a coordinated look. As for maintenance, clean the collar regularly with mild soap and water. Avoid using harsh chemicals as they might damage the patterns or the plastic hardware. Check the buckle often to make sure it's working properly. If it starts to show signs of wear, it's time to replace it. And always keep an eye on your dog while it's wearing the collar to ensure its safety.