I have curly hair that I highlight. When I have significant regrowth I often struggle as my hair seems to fall flat on my head. I have also recently cut my hair and flat roots just don't work with the style. This root lifting spray helps a lot! I spray it onto my roots before drying my hair. Result - hair that does not seem so flat and dull as before. It works well for my hair, but I think it will probably work even better with straight hair.