If your hair has high porosity then it gets wet quickly and easily when applying water to it. It also is able to become moisturized very quickly, but doesn't necessarily retain this moisture for more than a day or so at a time. This is because your hair cuticle is raised and more porous allowing moisture to easily come in and leave.
For most people with this hair type, they will need to moisturize their hair every few days with an excellent moisturizer that has water as the first ingredient, along with great natural and other ingredients that will help to retain an optimal moisture level in the hair to keep breakage, brittleness, and split ends away.
While necessary to lock in moisture, those with high porosity hair should go light on oils, to prevent their hair from becoming greasy or weighed down. The Step 2 Styling Creme was created with this in mind with the first ingredient being water, this formula is everything in one for weightless moisture and definition.