Instant Smooth Serum is a leave in treatment that is applied to damp hair, dried in and then straighteners activate the thermo straightening effect. This has a mini- brazilian blowdry effect on the hair as the product contains vegan kerazyme. The treatment leaves course and frizz hair soft, light, hydrated and smooth. The effect is long lasting if used with a a sulaphate free shampoo and conditioner. This is professional product for the consumer product try No More frizz to use at home.