Products containing a cationic conditioner such as Quaternium 70 (Stearamidopropyl Dimethyl Ammonium Chloride”> or a polymer such as P/DMAPA Acrylates Copolymer have been proven in independent studies to prevent damage from high-heat styling products like blow dryers and curling or straightening irons when used as part of a leave-in conditioner or styling product.