L'Oreal Paris Advanced Hairstyle Boost It Volume Inject Mousse transforms fine or flat hair with instant root-lifting technology. This lightweight, aerated formula delivers 24-hour extra strong hold without stiffness or crunchiness, maintaining bounce and body through humidity and daily activities. Integrated heat protection shields hair from blow-drying and styling damage while enhancing thickness and fullness. The 8.3 oz mousse provides professional-grade volumizing results, making it essential for anyone seeking lasting lift and dimensional styling control.