Using this dog collar is easy. First, measure your dog's neck accurately and follow the fitting instructions to choose the right size. When putting the collar on your dog, make sure it's not too tight or too loose. You should be able to fit two fingers between the collar and your dog's neck. As for maintenance, keep it away from water and moisture as much as possible. If it gets dirty, you can use a soft, dry cloth to wipe it gently. Avoid using harsh chemicals or cleaners as they may damage the leather. Also, regularly check the holes and the overall condition of the collar to ensure it remains safe for your dog to wear.