An integration hair system refers to the type of base material used and is ideal for women (or men) with thinning hair or diffused hair loss like in Female Pattern Hairloss. An integration system allows you to pull your existing growing hair directly through the unity. This allows you to wear a custom hair replacement system without shaving your head. Your own natural, growing hair is combined with the hair in the system to create a more voluminous and complete head of hair. Depending on the thickness and fullness of your growing hair, there are a variety of different integration hair systems all with varying sizes and shapes of holes in the mesh.