Kevin Murphy Killer Twirls Hair Curl Product Used once but doesn’t work with my hair, which is pretty straight. Hair needs to be wavy/curly for this. Info from Kevin Murphy website: NOURISHING CURL REFINING AIR-DRY CRÈME Define, enhance, and refine naturally textured or permed hair with our NEW KILLER products! Enhance your hair’s texture. This leave-in styler helps to define while keeping hair hydrated and protected against humidity and adding shine. Just twirl and go!