There’s no exact timeline as to how long a hair system will last. It varies on the way you wear and take care of your hair. A hair system will need to be replaced as the hair begins to come lose or thin in the hair system. While a few shedding hairs left on the base of a hair system is expected from the original hand tying process, there are five actions that can cause excessive hair loss, after the delivery of your system, and greatly decrease the life of your hair system.