i grabbed this out of a site

Looking for a little wave?
If your hair is naturally straight, achieving a soft wave is easier than you think. Prepare wet hair for the look by using Pantene Pro-V Sheer Volume Body Builder Volumizing Mousse. Dry your hair upside down to get some lift at the root, scrunching in an upward motion with your hands to add a little bit of texture throughout. Once hair is completely dry, separate hair into one-inch sections and using the Braun Smoothstyler Cordless Styler, place the ends into the curling iron and roll it upwards into the base of the hair. Do this all over your head and you've got the soft waves you're looking for.
* you dont have to use the exact products