Schwarzkopf OSiS+ Flatliner Iron Serum is an essential tool for giving straightened hair the extra care and protection it needs.

With 230°C heat proof ingredients, this serum will provide flawless protection when you use hot styling irons.

Ultra flat control, long lasting ultra flat shiny, silky looking, smooth and frizz-free hair are all guaranteed when you apply it to your hair thanks to the hydrolised silk and wheat proteins.

Flatliner Iron Serum has an OSiS+ Control Level of 3 for strong control, protection and style.