What is smooth hair conditioner? It is a retro conditioner.specific curly curly hair from 250 ml. How does it work? Formulated specifically for curly, frizzy and difficult hair, retro.specific curl hair conditioner curly hair, deeply restrict and discipline the hedgehog. Donate brightness and soft. After the retro specific shampoo.Specific Curl Hair, apply to wet hair. Leave on for 5/10 minutes and rinse carefully.