WHAT IT IS OSiS Session Label Flexible Hold Hairspray is an ultra-fine flexible holding mist that leaves hair feeling clean amp natural. WHAT IT DOES The innovative micro-diffuser spray technology and revolutionary instant-dry formula allows hair to retain bounce yet recall shape even after brushing. Schwarzkopf Professional OSiS Session Label Flexible Hold Hairspray is also easy to brush out so you can finish or reinvent your style. OSiS Session Label brings session styling performance and premium styling precision into your hands for unlimited hair reinvention. High performing super-dry hair sprays as well as weightless shine and mattifying products guarantee highly precise hair shaping amp amp forming - as seen on the latest runways.