WHAT IT IS Size Matters Big Volume Root Lift is an aerosol spray mousse that creates volume from the root. WHAT IT DOESRock Your Hair Size Matters Big Volume Root Lift gives you mega volume and body. This spray mousse protects against dry brittle hair. Humidity resistant formula is perfect for all hair types. Rock Your Hair is for the girl who rsquo s not afraid to be noticed Be bold and let the world see it pump up the volume and let your locks radiate the same feminine power that you exude Designed by the founder of Big Sexy Hair LA Celebrity stylist Michael O rsquo Rourke Rock Your Hair delivers big volume and endless styling capabilities combining ingredient technologies that protect and repair hair from damage brought on by heat styling and chemical processes.