Abstract: Clean-Necks System is a hair cutting method and apparatus that may be used by an individual to accurately trim his or her own hair. The clean-necks system may fasten around an individual's head using hook and loop fasteners. In a size-adjustable embodiment, notches found on the back may adjust the size of the unit, allowing use of the product by both adults and children. The bands that hold the clean-necks system around an individual's head may be elastic and flexible for comfort. A curved sloping guard may be attachable on the back of the clean-necks system whereby the curved sloping guard may be adjusted as desired by the user and may provide a cutting line. Once the clean-necks system is comfortably in place, individuals may utilize standard beard or hair trimmers and follow the curved sloped guard to cleanly remove hair from their neck in a straight line. Hair that is contained above and within the clean-necks system will be protected from unintentional shaving or cutting by the user.