High porosity - High porosity can be either an inherent property of hair or the result of damage from chemical processing, rough treatment or environmental damage. High porosity hair has gaps and holes in the cuticle, which let too much moisture into your hair and leave it prone to frizz and tangling in humid weather. Even simple acts such as bathing, swimming and shampooing can create more damage and breakage due to the sheer amount of moisture highly porous hair can absorb. Be sure to use anti-humectants in climates with high heat and humidity. This will help seal your damaged cuticles and prevent them from absorbing excess moisture in the air. Because highly porous hair can also lose moisture easily, it's important to use leave-in conditioners, moisturizers and sealers. Layering these products will help your hair hold on to the moisture you're giving it. You can even follow up with a heavy hair butter to help fill the gaps in your damaged cuticles and further protect your hair from losing too much moisture.

Low density - If you have low hair density, use light products that won't weigh your hair down and reduce its volume. Use a mousse to make your hair look fuller, and consider using dry shampoos, volumizing shampoos and volumizing conditioners with thickening agents. Simple, rounded hairstyles will also allow your curls, waves or coils to fall into place and give the appearance of more volume.

Fine width - Hair with fine width has a very small circumference and is very delicate and easy to damage. As a result it's often difficult to maintain length with fine hair. Deep conditioning after you wash is a good way to nourish and strengthen fine hair. You'll also want to keep manipulation of your hair to a minimum to avoid unnecessary breakage by reducing your use of combs and brushes and steering clear of elaborate, high-maintenance hairstyles.