Schwarzkopf Osis+ Session 300mlSchwarzkopf Osis Session Extreme Hold Hairspray is an essential for serious session stylists. This spray will give ultra long lasting hold, extreme power control and extreme control to your finish. It's fast drying to allow creative styling and non sticky. Schwarzkopf Osis Session Extreme Hold Hairspray is part of the Schwarzkopf Professional collection. Enhanced with a protective formula, Schwarzkopf Osis Session Extreme Hold Hairspray shields