The Schwarzkopf Professional Osis+ Flatliner Spray is a flattening spray to help you achieve super straight, sleek hair and protect your hair up to 200-degree heat. Designed to be applied to wet hair and blow-dried in to set your style. Control Level 3: Strong Control.
How to use: Spray through damp hair before blow-drying. Can be used on dry hair when your hair is thick.
Tip: Use a paddle brush during blow-drying for an exceptionally sleek finish.