EASY TO USE HAIR STRAIGHTENING KIT For hair that is frizzy and needs some calming, our Keratin Hair Smoothing Treatment Kit will smooth out and de-frizz all hair types, including coloured hair. This simple 3 step system gives salon-quality results right in your own home and can be washed and styled on the same day by using our keratin treatment kit for hair straightening. No chemicals and no specialist equipment are needed. And unlike many other products, our Keratin Straightening Kit is 100% Formaldehyde free. For healthy, smooth and glossy looking hair that lasts up to 4 months, this keratin treatment is for you! For long-lasting best results we recommend using Keratin Hair System Salt-Free Shampoo & Conditioner for keratin hair straightening treatment aftercare