Product Overview Give your hair a real volume and thickness boost with Nioxin 3D Styling Thickening Spray 150ml. With its Pro-Thick technology, this mist’s formula features a blend of thickening polymers which carefully coat each strand of hair. These polymers then expand, creating space between hair fibres for thicker and fuller-looking hair. Spray on hair for gorgeous volume and body - without weighing it down or creating stiffness!