If you don't want to ditch the drier or the straightening iron, but you're struggling with brittle, frazzled hair, it's time for Dove Heat DEFENSE System. Help protect your hair with our expert damage care technology: Heat Defense system with patented MICRO MOISTURE SERUM builds a protective shield around the hair fiber to help your hair defend against high temperatures from heat styling. Did you know Heat styling appliances can raise hair temperature up to 392° but at 284° essential proteins in hair start degrading. Heat Defense leaves you hair protected and ready to style every day. Dove damage therapy, HEAT DEFENSE shampoo. WITH PATENTED MICRO MOISTURE SERUM. HELPS PROTECT HAIR FROM HEAT-STYLING DAMAGE. ADVANCED CARE & REPAIR FOR BEAUTIFUL HAIR. Matrix.