Cationic Hydration Interlink •Works with Heat Styling Tools •Helps Smooth Hair Cuticle •Paraben Free Thermally activated smoothing treatment that works with the heat of a styling iron to smooth the hair cuticle, lock in moisture and seal out humidity creating soft, frizz-free hair that lasts up to 5 days*. Infused with Keratrix™, a unique compound that utilizes sustained release technology to gradually release strengthening and smoothing proteins as needed for long lasting treatment results. Not tested on animals. *Based on shampooing once daily. How to use: Before blow drying, apply a small amount to hair and work through evenly. Blow dry hair and follow with the Hairstyling Iron.