Schwarzkopf Professional Session Label Smooth Strong Hairspray is a finishing spray that provides a strong, long-lasting hold with a natural feel. It's moldable, fast-drying, and can help smooth frizz and flyway's. The hairspray is also humidity resistant for up to 48 hours and can protect hair from heat up to 450 °F/230 °C. It's ideal for undo's and can keep flyway's in place.