Nioxin 3D Styling Thickening Hair Gel 140ml For Thinning Hair Brand New Free P&P. Provide definition and hold to thinning hair with Nioxin 3D Styling Thickening Gel. As a part of the Nioxin professional hair styling products line, this styling gel gives a noticeable volume boost and a fuller end look. Nioxin thickening hair gel provides strong hold and texture for fuller-looking and smooth feeling hair, without stiffness or stickiness. How to use Apply 3 cm of Nioxin 3D Styling Thickening Gel into palm of hands and work through damp hair. Blow dry and style as desired.