Take control of dense, dry and sensitive hair with the Redken Real Control Slim Serum. Its caring formula reduces excessive volume and adds sleek smoothness and luscious shine to your locks. Use the Redken Real Control Slim Serum everyday to take control of your dry and sensitive hair. Its caring formula provides you with frizz control for a smooth, flawless finish with shine and separation. Directions of use: Apply a small amount in palms and work through towel-dried hair. Leave in and style as usual.