MELU Shield is a heat protector spray for long, delicate or damaged hair. Sprayed onto damp, towel-dried hair, it will protect even the most fragile locks from thermal styling up to 230 degrees. It contains rosemary extract (an antioxidant) to nourish the hair and give it a beautifully smooth, shiny finish that's impervious to static and will help protect your style from humidity. Don't even think about brandishing your straighteners until you've sprayed MELU Shield on your tresses.