This allows you to go from curly to straight hairstyles without harsh chemicals and without permanently changing your hair's natural texture. Go back and forth between natural and straight styles with unparalleled touchable softness, movement and shine. Reversible straightening takes up to 4-6 weeks and the maintenance system (included) protects against reversal and combats humidity so straight styles last longer. This system's revolutionary Inner-Active conditioning delivers the highest level of humidity you've ever experienced. Use the System's Maintenance Shampoo and Conditioner (included) to maintain Inner-Active conditioning that keeps straight styles humidity-resistant and resilient.