The product you're referring to is the Schwarzkopf Professional OSiS+ Session Extra Strong Hold Hairspray (also sometimes called Osis+ Session Label The Strong).1Here are the key details for the 300ml size:Hold Level: Extra Strong Hold or Extreme Hold (often marked as 4/4 or ++++).2 It's designed for maximum control and long-lasting styles.3Purpose: It is a finishing hairspray used to lock in intricate styles, updos, or any look that requires firm, reliable hold all day long.4Key Benefits:Ultra-long-lasting, extreme hold and powerful control.5Fast-drying and non-sticky formula.6Easy to brush out without leaving flakes or visible residue.Protection against humidity and wind.7Heat protection (often up to 8$230^{\circ}\text{C}$ or 9$450^{\circ}\text{F}$).10Often features a micro-fine dispersion for even coverage.11