I have wavy hair that is very prone to frizziness. I receive keratin treatments about twice a year to help smooth out the frizzies as well control the wave. Even with the keratin treatments my hair takes time to get straight. This product was awesome! I used just one small pump before blow drying and my hair felt so soft and smooth. I then ran a flat iron over it in a few places and my hair stayed soft, smooth and straight for 3 days! I didn't shampoo or restyle at all.