Our Level 1 of the 4 Level Hair System is a 2-in-1 shampoo/conditioner all in one. It is designed for straight hair has little to no texture. The level of hair is completely or close to completely straight from root to tip. This hair type tends to be very shiny, lacking in volume, resilient (hard to damage) and is usually really hard to curl. Our 2.7 oz. is perfect for the person on the go and travel size carry on.