Two Common types of hair systems available:
Stock Hair Systems —
This common type of hair system is mass produced according to the most common color graduations and hair loss sizes. Because they are sold “as is” and off-the-shelf, they can be a very inexpensive way to buy. However, many people have a more unique (or larger) hair loss pattern than the standard horseshoe shape.
Custom Hair Systems —
The obvious benefit to a custom system is the level of measurements that are taken for your specific size and pattern of hair loss. Getting an exact color match and organic graduation into your own natural growing hair is also an important detail to achieving an undetectable look