You need to see it to believe it humidity proofing…plus silky smooth texture! Lasts through 3 to 4 shampoos. Inspired by new textile technology, covers each hair strand with an invisible waterproofing cloak. An absolute must for anyone looking to fight frizzy hair Heat-activated polymer works to compress, tighten and seal hair strands Hair is supernaturally-sleek, smooth and super-silky Dream Coat will not build up, weigh hair down or make it greasy Activated by heat, effects last for 3 to 4 shampoos.