CHI Enviro Highlighted Porous and Fine Hair Treatment's unique formula is the key to help smooth and straighten highlighted/porous/fine hair. It contains silk and pearl which helps eliminate up to 95% of frizz and curl. The rich, luxurious formula will penetrate deep into the damaged cuticle. It contains the perfect balance of silk required for highlighted/porous/fine hair types to achieve ideal smooth results. Typical results last up to 4 months.