CHI Enviro Smoothing Treatment is a revolutionary and safe treatment. It eliminates up to 95% of frizz while making curly hair manageable. It instantly adds amazing shine, silkiness, and condition to the hair. The results of this safe alternative to traditional, hair straightening systems are amazing. The system safely smooths frizzy, curly hair into beautiful, soft and silk hair. Depending on hair type, results typically last up to 4 months. This unique formula is the key to smooth and strengthen highlighted/porous/fine hair. The rich, luxurious formula will penetrate deep into the damaged cuticle.