Shampoo use is very important when purchasing haircare products but its not as much a necessity in case you keep the right technique yourself by washing your hair only with luke warm water (3-4 inches above the neck). Normally it is enough to shampoo your hair with plain water once a week. Don't stop washing it after this until the end of normal showers and use good detangling sprays, mousse, or gels to dry your hair without making them brittle & frizzy which leads you in paying much for the styling assistance. Also combing & drying is important-comb over wet human head at night by keeping balanced combs that are light on one side and heavy on other sides.