Joico JoiFULL Volumizing Shampoo, 10.1 oz. is the best volumizing shampoo for flat, limp and lifeless locks. Excess oil and impurities are washed away to give thin hair a lift. It gently cleanses to remove build-up that weighs hair down while plumping strands for full, luxurious volume. It is specifically designed to thicken the texture of fine hair.