REF Weightless Volume Shampoo. This sulfate-free shampoo is meticulously crafted with botanical extracts, meticulously chosen to fortify and enhance the structure of fine or thin hair. Formulated to revitalize your locks, it intensifies fullness, density, and shine, leaving your hair looking and feeling rejuvenated. Say goodbye to limp, lifeless hair and hello to bouncy, voluminous locks with REF Weightless Volume Shampoo.