This strong control Osis Flatliner Iron Serum Spray is ideal for ultra flat styles. With 200°C heat proof ingredients, this serum will give extra care & protection while using straighteners, also provide flawless protection with its hydrolised silk & wheat proteins when you use hot styling irons. A flat shiny, silky & frizz-free hair style will last for your all day long! How To Use: Apply to dry hair before use of hot irons.